libarchive: Do not use MNT_NOATIME if not defined

Use the same pattern already used elsewhere in archive_read_disk_posix.c
for ST_NOATIME to use MNT_NOATIME only when defined.

Utilities/cmlibarchive/libarchive/archive_read_disk_posix.c

@@ -1321,9 +1321,11 @@ setup_current_filesystem(struct archive_read_disk *a)
 		t->current_filesystem->synthetic = 0;
 #endif
 
+#if defined(MNT_NOATIME)
 	if (sfs.f_flags & MNT_NOATIME)
 		t->current_filesystem->noatime = 1;
 	else
+#endif
 		t->current_filesystem->noatime = 0;
 
 #if defined(HAVE_READDIR_R)