sys::socket adding GetOnly `TCP_FUNCTION_ALIAS` for freebsd. #1665

Job	Run time
macos	3m 2s
macos-aarch64	1m 34s
minver	11s
linux_native_builds (x86_64-unknown-linux-gnu)	2m 22s
linux_native_builds (x86_64-unknown-linux-musl)	2m 10s
solaris (x86_64-pc-solaris)	3m 14s
rustfmt	5s
rust_stable	1m 35s
tier3 (x86_64-unknown-dragonfly)	1m 1s
tier3 (x86_64-unknown-openbsd)	1m 1s
tier3 (x86_64-unknown-haiku)	1m 0s
tier3 (armv7-unknown-linux-uclibceabihf)	1m 14s
redox	38s
cross (arm-unknown-linux-gnueabi)	1m 54s
cross_compiling (aarch64-linux-android)	38s
cross (armv7-unknown-linux-gnueabihf)	1m 51s
cross_compiling (arm-linux-androideabi)	40s
cross (i686-unknown-linux-gnu)	1m 47s
cross_compiling (armv7-linux-androideabi)	37s
cross (i686-unknown-linux-musl)	1m 52s
cross_compiling (i686-linux-android)	40s
cross (mips-unknown-linux-gnu)	1m 59s
cross_compiling (x86_64-linux-android)	38s
cross (mips64-unknown-linux-gnuabi64)	1m 48s
cross_compiling (arm-unknown-linux-musleabi)	39s
cross (mips64el-unknown-linux-gnuabi64)	2m 3s
cross_compiling (x86_64-unknown-fuchsia)	33s
cross (mipsel-unknown-linux-gnu)	1m 50s
cross_compiling (x86_64-unknown-illumos)	31s
cross (powerpc64le-unknown-linux-gnu)	1m 51s
cross_compiling (aarch64-apple-ios, true)	34s
cross (loongarch64-unknown-linux-gnu)	1m 47s
cross_compiling (powerpc64-unknown-linux-gnu)	41s
cross_compiling (s390x-unknown-linux-gnu)	42s
cross_compiling (x86_64-unknown-linux-gnux32)	41s
cross_compiling (x86_64-unknown-netbsd)	32s
	45m 55s

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