Update stderr.rFix setting O_NONBLOCK in parallel::stderr::set_non_bl… #1061

Job	Run time
Test CUDA support	27s
Clippy	11s
MSRV (ubuntu-latest)	27s
MSRV (windows-latest)	43s
Test aarch64-apple-tvos	1m 49s
Rustfmt	16s
Test (stable)	35s
Test (beta)	36s
Test (nightly)	35s
Test (linux32)	44s
Test (macos)	3m 3s
Test (aarch64-ios)	50s
Test (win32)	1m 19s
Test (win64)	1m 50s
Test (mingw32)	1m 57s
Test (mingw64)	1m 38s
Test (windows-2019)	3m 8s
Test (windows-aarch64, windows-latest, stable, aarch64-pc-windows-msvc, --no-run)	1m 30s
	21m 38s

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