Auto merge of #1129 - gnzlbg:sgx, r=gnzlbg

ci/style.rs

libc-test/build.rs

src/cloudabi/mod.rs

src/fuchsia/mod.rs

src/lib.rs

src/redox/mod.rs

src/sgx.rs

src/switch.rs

src/unix/bsd/mod.rs

src/unix/haiku/mod.rs

src/unix/hermit/mod.rs

src/unix/mod.rs

src/unix/newlib/mod.rs

src/unix/notbsd/emscripten.rs

src/unix/notbsd/linux/mod.rs

src/unix/solaris/mod.rs

src/unix/uclibc/mod.rs

src/windows.rs