Add more posix message queue functions for Linux and all for solarish

[tormol]

I'm not able to run the tests locally (likely due to too old headers on Ubuntu 18.04), but I've tested my posixmq crate with these functions on Linux and OmniOS.

[rust-highfive]

r? @gnzlbg

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[gnzlbg]

Linux test are passing, but we don't test Illuminos, Solaris, etc. on CI yet. @jasonbking would you be able to see if these tests pass for you there as well ?

[bors]

☔ The latest upstream changes (presumably #1389) made this pull request unmergeable. Please resolve the merge conflicts.

[jasonbking]

cargo test was successful on illumos -- was there any other specific testing you were interested in?

[gnzlbg]

Did that run libc-test tests? Otherwise you might need to do cargo test --all, or cargo test --manifest-path libc-test/Cargo.toml.

[jasonbking]

I'll look more this evening, but the ctest crate is throwing errors when building (because of LLVM issues, I'm still on 1.33, so not sure if that makes a difference).

[gnzlbg]

@bors: r+

[bors]

📌 Commit bbcfd3c has been approved by gnzlbg

[bors]

⌛ Testing commit bbcfd3c with merge 635ced1...

[bors]

☀️ Test successful - checks-cirrus-freebsd-11, checks-cirrus-freebsd-12, checks-travis, status-appveyor
Approved by: gnzlbg
Pushing 635ced1 to master...