Merge branch 'master' into wait

Cargo.lock

Cargo.toml

cbindgen

include/bits/timespec.h

src/fcntl/cbindgen.toml

src/fenv/src/lib.rs

src/float/src/lib.rs

src/signal/Cargo.toml

src/signal/build.rs

src/signal/cbindgen.toml

src/signal/src/lib.rs

src/signal/src/linux.rs

src/signal/src/redox.rs

src/string/src/lib.rs

src/wait/cbindgen.toml

tests/Makefile

tests/expected/string/strpbrk.stderr

tests/expected/string/strpbrk.stdout

tests/expected/string/strstr.stderr

tests/expected/string/strstr.stdout