Retry poll on EINTR/EAGAIN instead of debug printing #468

Job	Run time
cargo-deny (advisories)	18s
lint	21s
cargo-deny (bans licenses sources)	17s
aarch64-apple-ios / build	21s
aarch64-apple-darwin-nightly / build	28s
aarch64-apple-darwin / build	25s
aarch64-unknown-linux-gnu / build	29s
aarch64-unknown-linux-musl / build	57s
arm-linux-androideabi / build	31s
armv7-linux-androideabi / build	26s
i686-pc-windows-gnu / build	1m 3s
i686-pc-windows-msvc / build	2m 34s
i686-unknown-linux-gnu / build	34s
i686-unknown-linux-musl / build	57s
msrv-aarch64-apple-darwin / build	41s
msrv-arm-linux-androideabi / build	45s
msrv-x86_64-pc-windows-msvc / build	57s
msrv-x86_64-unknown-freebsd / build	43s
msrv-x86_64-unknown-linux-gnu / build	35s
msrv-x86_64-unknown-linux-musl / build	54s
msrv-x86_64-unknown-netbsd / build	37s
x86_64-apple-darwin / build	43s
x86_64-pc-windows-gnu / build	1m 38s
x86_64-pc-windows-msvc / build	2m 42s
x86_64-pc-windows-msvc-nightly / build	1m 28s
x86_64-unknown-freebsd / build	30s
x86_64-unknown-linux-gnu / build	1m 13s
x86_64-unknown-linux-gnu-nightly / build	47s
x86_64-unknown-linux-musl / build	54s
x86_64-unknown-netbsd / build	21s
	25m 9s

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