gio/tests/file.c:Fix expectations when running as root
This test asserts that expected_success will fail when source file unreadable, but processes with CAP_DAC_OVERRIDE on Linux or uid 0 on traditional Unix can and do ignore DAC permissions.
This test asserts that expected_success will fail when source file unreadable, but processes with CAP_DAC_OVERRIDE on Linux or uid 0 on traditional Unix can and do ignore DAC permissions.