Somehow they were not included in CL 119495. No functional change,
faccessat was just moved.

Change-Id: I954a37109ff2287de14cdf657bd309cae96671de
Reviewed-on: https://go-review.googlesource.com/122297
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>