Fix libc-tests for illumos/solaris target

[pfmooney]

This brings the tests back to passing on modern illumos machines.

[pfmooney]

test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
RUNNING ALL TESTS
PASSED 8091 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

[rustbot]

r? @JohnTitor

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[rustbot]

Some changes occurred in solarish module

cc @jclulow, @pfmooney

[JohnTitor]

Thank you! @bors r+

[bors]

📌 Commit 7cdb213 has been approved by JohnTitor

It is now in the queue for this repository.

[bors]

⌛ Testing commit 7cdb213 with merge 7d8a284...

[bors]

☀️ Test successful - checks-actions, checks-cirrus-freebsd-12, checks-cirrus-freebsd-13, checks-cirrus-freebsd-14
Approved by: JohnTitor
Pushing 7d8a284 to main...