Update license year

LICENSE-MIT

@@ -1,4 +1,4 @@
-Copyright (c) 2014 The Rust Project Developers
+Copyright (c) 2014-2020 The Rust Project Developers
 
 Permission is hereby granted, free of charge, to any
 person obtaining a copy of this software and associated

ci/android-install-ndk.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env sh
+
 set -ex
 
 NDK=android-ndk-r19c

ci/android-install-sdk.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env sh
+
 set -ex
 
 # Prep the SDK and emulator

ci/android-sysimage.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 set -ex
 
 URL=https://dl.google.com/android/repository/sys-img/android

ci/emscripten-entry.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 set -ex
 
 # shellcheck disable=SC1091

ci/emscripten.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 set -ex
 
 hide_output() {