Update Ubuntu images to 19.04

ci/docker/aarch64-linux-android/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN dpkg --add-architecture i386 && \
     apt-get update && \

ci/docker/aarch64-unknown-linux-gnu/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc libc6-dev ca-certificates \
   gcc-aarch64-linux-gnu libc6-dev-arm64-cross qemu-user

ci/docker/aarch64-unknown-linux-musl/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc make libc6-dev git curl ca-certificates \

ci/docker/arm-linux-androideabi/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN dpkg --add-architecture i386 && \
     apt-get update && \

ci/docker/arm-unknown-linux-gnueabihf/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc libc6-dev ca-certificates \
   gcc-arm-linux-gnueabihf libc6-dev-armhf-cross qemu-user

ci/docker/arm-unknown-linux-musleabihf/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc make libc6-dev git curl ca-certificates \

ci/docker/asmjs-unknown-emscripten/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \

ci/docker/i686-linux-android/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN dpkg --add-architecture i386 && \
     apt-get update && \

ci/docker/i686-unknown-linux-gnu/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \
   gcc-multilib libc6-dev ca-certificates

ci/docker/i686-unknown-linux-musl/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN dpkg --add-architecture i386
 RUN apt-get update

ci/docker/mips-unknown-linux-gnu/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \

ci/docker/mips-unknown-linux-musl/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates qemu-system-mips curl \

ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \

ci/docker/mips64el-unknown-linux-gnuabi64/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \

ci/docker/mipsel-unknown-linux-musl/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates qemu-system-mips curl \

ci/docker/powerpc-unknown-linux-gnu/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \

ci/docker/powerpc64-unknown-linux-gnu/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \

ci/docker/powerpc64le-unknown-linux-gnu/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \

ci/docker/s390x-unknown-linux-gnu/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         curl ca-certificates \

ci/docker/sparc64-unknown-linux-gnu/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         curl ca-certificates \

ci/docker/wasm32-unknown-emscripten/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \

ci/docker/wasm32-unknown-wasi/Dockerfile

@@ -1,7 +1,7 @@
 # In the first container we want to assemble the `wasi-sysroot` by compiling it
 # from source. This requires a clang 8.0+ compiler with enough wasm support and
 # then we're just running a standard `make` inside of what we clone.
-FROM ubuntu:18.04 as wasi-sysroot
+FROM ubuntu:19.04 as wasi-sysroot
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
@@ -40,7 +40,7 @@ COPY docker/wasm32-unknown-wasi/clang.sh /wasi-sysroot/bin/clang
 # used to execute wasi executables. This is a standard Rust project so we're
 # just checking out a known revision (which pairs with the sysroot one we
 # downlaoded above) and then we're building it with Cargo
-FROM ubuntu:18.04 as wasmtime
+FROM ubuntu:19.04 as wasmtime
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
@@ -66,7 +66,7 @@ RUN cargo build --release --manifest-path wasmtime/Cargo.toml
 # And finally in the last image we're going to assemble everything together.
 # We'll install things needed at runtime for now and then copy over the
 # sysroot/wasmtime artifacts into their final location.
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \

ci/docker/x86_64-linux-android/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \

ci/docker/x86_64-unknown-linux-gnu/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \
   gcc libc6-dev ca-certificates

ci/docker/x86_64-unknown-linux-gnux32/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \
   gcc-multilib libc6-dev ca-certificates

ci/docker/x86_64-unknown-linux-musl/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \

libc-test/build.rs

@@ -2260,7 +2260,7 @@ fn test_linux(target: &str) {
     // This macro re-deifnes fscanf,scanf,sscanf to link to the symbols that are
     // deprecated since glibc >= 2.29. This allows Rust binaries to link against
     // glibc versions older than 2.29.
-    cfg.define("DEPRECATED_SCANF", None);
+    cfg.define("__GLIBC_USE_DEPRECATED_SCANF", None);
 
     // FIXME: still necessary?
     cfg.flag("-Wno-deprecated-declarations");