os.linux: faccessat wrapper prefer to faccessat syscall when flags is zero.
This make `fs.Dir.access` has compatibility like the zig version before.
With this change the `zig build --search-prefix` command would work again like
the zig 0.14 version when used on Ubuntu22.04, kernel version 5.4.
caa89c7601Qun He committed on 8/25/2025, 10:11:43 PM· committed by Alex Rønne Petersenparent6f07cc9