Solaris: fixes build and tests, adds CI #1611

Job	Run time
macos-aarch64	3m 3s
linux_native_builds (x86_64-unknown-linux-gnu)	3m 32s
macos	38s
linux_native_builds (x86_64-unknown-linux-musl)	4m 21s
minver	15s
rust_stable	1m 38s
rustfmt	7s
solaris (x86_64-pc-solaris)	4m 8s
tier3 (x86_64-unknown-dragonfly)	1m 3s
tier3 (x86_64-unknown-openbsd)	1m 3s
tier3 (x86_64-unknown-haiku)	1m 2s
tier3 (armv7-unknown-linux-uclibceabihf)	1m 19s
tier3 (i686-unknown-hurd-gnu)	37s
cross	0s
cross_compiling	0s
redox	0s
	22m 46s

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