Tobias Klauser 64077c9b56 unix: add Faccessat2 and use it in Faccessat if available ...

Linux kernel 5.8 added the faccessat2 syscall taking a flags argument.
Attempt to use it in Faccessat and fall back to the existing
implementation mimicking glibc faccessat.

Tested on Debian Buster with manually built Linux kernel 5.8

Suggested by Ian Lance Taylor.

Change-Id: Ia14f744a63dde7ff2dea34935cabc62937de9cb5
Reviewed-on: https://go-review.googlesource.com/c/sys/+/246537
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

2020-08-03 21:05:38 +00:00

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