CVE-2015-7560: s3: libsmb: Rename cli_posix_getfaclXX() functions to cli_posix_getacl() as they operate on pathnames.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=11648

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
