Merge pull request #1697 from JohnTitor/emscripten

ci/azure.yml

ci/emscripten-entry.sh

ci/emscripten.sh

libc-test/build.rs

src/unix/linux_like/android/mod.rs

src/unix/linux_like/emscripten/align.rs

src/unix/linux_like/emscripten/mod.rs

src/unix/linux_like/linux/mod.rs

src/unix/linux_like/mod.rs