x/sys/unix: TestPpoll failures

[gopherbot]

#!watchflakes
default <- pkg == "golang.org/x/sys/unix" && test == "TestPpoll"

Issue created automatically to collect these failures.

Example (log):

--- FAIL: TestPpoll (0.00s)
    syscall_linux_test.go:299: Ppoll: unexpected error: interrupted system call

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/sys/unix" && test == "TestPpoll"

2024-03-12 20:49 linux-ppc64-sid-buildlet sys@95f07eca go@412623c5 x/sys/unix.TestPpoll (log)

--- FAIL: TestPpoll (0.00s)
    syscall_linux_test.go:299: Ppoll: unexpected error: interrupted system call

— watchflakes

[mknyszek]

CC @golang/ppc64

[gopherbot]

Change https://go.dev/cl/627395 mentions this issue: unix: don't fail TestPpoll on EINTR