Work around FreeBSD oddness #486

Job	Run time
CheckTargets	1m 27s
Clippy	10s
Docs	8s
Check (aarch64-apple-ios)	32s
Check (aarch64-apple-tvos)	30s
MinimalVersions (ubuntu-latest)	21s
Check (aarch64-unknown-openbsd)	32s
MSRV (ubuntu-latest)	11s
MinimalVersions (macos-latest)	27s
Check (arm64_32-apple-watchos)	32s
Nightly	19s
MSRV (macos-latest)	16s
Check (armv7-sony-vita-newlibeabihf)	28s
MinimalVersions (windows-latest)	39s
MSRV (windows-latest)	31s
Check (sparcv9-sun-solaris)	29s
Rustfmt	5s
Check (x86_64-pc-solaris)	28s
Sanitizer (address)	42s
Check (x86_64-unknown-dragonfly)	30s
Test (ubuntu-latest)	42s
Sanitizer (leak)	40s
Check (x86_64-unknown-openbsd)	30s
TestPoll	28s
Test (macos-latest)	41s
Sanitizer (memory)	1m 6s
Test (windows-latest)	2m 11s
Sanitizer (thread)	41s
TestWakerPipe	28s
Passed	1s
	16m 45s

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