Matt Layher 36772127a2 unix: implement Waitid on Linux ...

waitid(2) can be used to wait on pidfds. Update TestPidfd to test this new
functionality as well.

Change-Id: I5f26140b9afd5a6ec3f04217fb1c91542936a2c3
Reviewed-on: https://go-review.googlesource.com/c/sys/+/395936
Trust: Matt Layher <mdlayher@gmail.com>
Run-TryBot: Matt Layher <mdlayher@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>

2022-03-25 20:38:50 +00:00

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