feat: clock_nanosleep() (#2277) #20

Job	Run time
rust_stable	1m 1s
macos	1m 39s
linux_native_builds (x86_64-unknown-linux-gnu)	1m 20s
minver	17s
linux_native_builds (x86_64-unknown-linux-musl)	1m 16s
rustfmt	14s
tier3 (x86_64-unknown-dragonfly)	1m 0s
tier3 (x86_64-unknown-openbsd)	57s
tier3 (x86_64-unknown-haiku)	52s
tier3 (i686-unknown-hurd-gnu)	57s
redox	36s
cross (arm-unknown-linux-gnueabi)	1m 43s
cross_compiling (aarch64-linux-android)	32s
cross (armv7-unknown-linux-gnueabihf)	1m 45s
cross_compiling (arm-linux-androideabi)	35s
cross (i686-unknown-linux-gnu)	1m 43s
cross_compiling (armv7-linux-androideabi)	37s
cross (i686-unknown-linux-musl)	1m 43s
cross_compiling (i686-linux-android)	32s
cross (mips-unknown-linux-gnu)	1m 44s
cross_compiling (x86_64-linux-android)	35s
cross (mips64-unknown-linux-gnuabi64)	1m 44s
cross_compiling (arm-unknown-linux-musleabi)	35s
cross (mips64el-unknown-linux-gnuabi64)	1m 41s
cross_compiling (x86_64-unknown-fuchsia)	27s
cross (mipsel-unknown-linux-gnu)	1m 44s
cross_compiling (x86_64-unknown-illumos)	27s
cross (powerpc64le-unknown-linux-gnu)	1m 48s
cross_compiling (aarch64-apple-ios, true)	29s
cross_compiling (powerpc64-unknown-linux-gnu)	35s
cross_compiling (s390x-unknown-linux-gnu)	33s
cross_compiling (x86_64-unknown-linux-gnux32)	38s
cross_compiling (x86_64-unknown-netbsd)	32s
	32m 51s

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