test: test posix_spawn() and add negative test cases #1807

Job	Run time
macos-aarch64	3m 17s
linux_native_builds (x86_64-unknown-linux-gnu)	3m 29s
macos	5m 47s
linux_native_builds (x86_64-unknown-linux-musl)	3m 38s
minver	13s
rust_stable	1m 26s
rustfmt	14s
solaris (x86_64-pc-solaris)	6m 14s
tier3 (x86_64-unknown-dragonfly)	59s
tier3 (x86_64-unknown-openbsd)	58s
tier3 (x86_64-unknown-haiku)	58s
tier3 (armv7-unknown-linux-uclibceabihf)	1m 11s
tier3 (i686-unknown-hurd-gnu)	58s
redox	37s
cross (arm-unknown-linux-gnueabi)	2m 4s
cross_compiling (aarch64-linux-android)	38s
cross (armv7-unknown-linux-gnueabihf)	2m 12s
cross_compiling (arm-linux-androideabi)	37s
cross (i686-unknown-linux-gnu)	1m 55s
cross (i686-unknown-linux-musl)	2m 4s
cross_compiling (armv7-linux-androideabi)	37s
cross (powerpc64le-unknown-linux-gnu)	1m 55s
cross_compiling (i686-linux-android)	42s
cross (loongarch64-unknown-linux-gnu)	1m 53s
cross_compiling (x86_64-linux-android)	39s
cross_compiling (arm-unknown-linux-musleabi)	43s
cross_compiling (x86_64-unknown-fuchsia)	31s
cross_compiling (x86_64-unknown-illumos)	32s
cross_compiling (aarch64-apple-ios, true)	34s
cross_compiling (powerpc64-unknown-linux-gnu)	46s
cross_compiling (s390x-unknown-linux-gnu)	43s
cross_compiling (x86_64-unknown-linux-gnux32)	40s
cross_compiling (x86_64-unknown-netbsd)	36s
	50m 20s

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