rustbuild: Add bench = false to std shim crates

src/libcompiler_builtins/Cargo.toml

@@ -8,6 +8,7 @@ version = "0.0.0"
 name = "compiler_builtins"
 path = "lib.rs"
 test = false
+bench = false
 
 [dependencies]
 core = { path = "../libcore" }

src/libpanic_abort/Cargo.toml

@@ -6,6 +6,7 @@ version = "0.0.0"
 [lib]
 path = "lib.rs"
 test = false
+bench = false
 
 [dependencies]
 core = { path = "../libcore" }

src/libpanic_unwind/Cargo.toml

@@ -6,6 +6,7 @@ version = "0.0.0"
 [lib]
 path = "lib.rs"
 test = false
+bench = false
 
 [dependencies]
 alloc = { path = "../liballoc" }

src/librustc_unicode/Cargo.toml

@@ -7,6 +7,7 @@ version = "0.0.0"
 name = "rustc_unicode"
 path = "lib.rs"
 test = false
+bench = false
 
 [dependencies]
 core = { path = "../libcore" }

src/libunwind/Cargo.toml

@@ -8,6 +8,7 @@ build = "build.rs"
 name = "unwind"
 path = "lib.rs"
 test = false
+bench = false
 
 [dependencies]
 core = { path = "../libcore" }

src/rustc/libc_shim/Cargo.toml

@@ -16,6 +16,7 @@ build = "build.rs"
 name = "libc"
 path = "../../liblibc/src/lib.rs"
 test = false
+bench = false
 
 [dependencies]
 core = { path = "../../libcore" }