std.posix: Skip Stat struct comparison in fstatat test for s390x-linux.

On s390x-linux, fstat() does not have nanosecond precision, but fstatat() does.
As a result, comparing Stat structs returned from these syscalls is doomed to
fail.
7f55fa12f4Alex Rønne Petersen committed on 10/3/2024, 10:26:55 PMparentf4c2372
1 file changedLine totals unavailable