Merge branch 'rustfmt' into 'master'

src/header/assert/mod.rs

src/header/bits_pthread/mod.rs

src/header/poll/mod.rs

src/header/pthread/attr.rs

src/header/pthread/barrier.rs

src/header/pthread/cond.rs

src/header/pthread/mod.rs

src/header/pthread/mutex.rs

src/header/pthread/once.rs

src/header/pthread/rwlock.rs

src/header/pthread/spin.rs

src/header/pthread/tls.rs

src/header/sched/mod.rs

src/header/semaphore/mod.rs

src/header/signal/mod.rs

src/header/stdio/mod.rs

src/header/stdlib/mod.rs

src/header/strings/mod.rs

src/header/sys_ioctl/redox.rs

src/header/sys_resource/mod.rs