Merge branch 'master' of github.com:rust-lang/libc into exchangedata

.travis.yml

Cargo.lock

Cargo.toml

ci/ios/deploy_and_run_on_ios_simulator.rs

libc-test/Cargo.toml

libc-test/build.rs

src/lib.rs

src/switch.rs

src/unix/bsd/apple/mod.rs

src/unix/bsd/netbsdlike/netbsd/aarch64.rs

src/unix/bsd/netbsdlike/netbsd/arm.rs

src/unix/bsd/netbsdlike/netbsd/mod.rs

src/unix/bsd/netbsdlike/netbsd/other/mod.rs

src/unix/bsd/netbsdlike/netbsd/powerpc.rs

src/unix/bsd/netbsdlike/netbsd/sparc64.rs

src/unix/bsd/netbsdlike/netbsd/x86.rs

src/unix/bsd/netbsdlike/netbsd/x86_64.rs

src/unix/hermit/aarch64.rs

src/unix/hermit/mod.rs

src/unix/hermit/x86_64.rs