Provide {get,set}_socket_nosigpipe on NetBSD and DragonFly BSD #3391

Job	Run time
Check (stable)	10m 9s
Check (nightly)	7m 57s
Check selected Tier 3 platforms (nightly)	4m 18s
Check (1.63)	17m 33s
Check nightly-only targets (nightly)	29s
Check --no-default-features (nightly)	1m 9s
Rustfmt	16s
Test rustix_use_experimental_asm (powerpc64le-linux)	1m 30s
Test use-libc (ubuntu)	1m 5s
Test (ubuntu)	1m 6s
Test use-libc (i686-linux)	1m 30s
Test (ubuntu-20.04)	1m 2s
Test use-libc (aarch64-linux)	2m 26s
Test (i686-linux)	1m 25s
Test use-libc (powerpc64le-linux)	1m 45s
Test (aarch64-linux)	1m 33s
Test use-libc (riscv64-linux)	1m 32s
Test (powerpc64le-linux)	1m 34s
Test use-libc (arm-linux)	2m 3s
Test (riscv64-linux)	1m 31s
Test (s390x-linux)	1m 36s
Test (arm-linux)	1m 25s
Test (ubuntu-stable)	1m 17s
Test (i686-linux-stable)	1m 29s
Test (aarch64-linux-stable)	1m 39s
Test (riscv64-linux-stable)	2m 20s
Test (s390x-linux-stable)	1m 37s
Test (powerpc64le-linux-stable)	1m 38s
Test (arm-linux-stable)	1m 34s
Test (ubuntu-1.63)	4m 40s
Test (i686-linux-1.63)	5m 5s
Test (aarch64-linux-1.63)	5m 24s
Test (riscv64-linux-1.63)	5m 13s
Test (s390x-linux-1.63)	5m 12s
Test (powerpc64le-linux-1.63)	5m 12s
Test (arm-linux-1.63)	5m 10s
Test (macos-latest)	1m 25s
Test (macos-11)	1m 23s
Test (windows)	1m 15s
Test (windows-2019)	1m 16s
	1h 57m 43s

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