generic/554: hide permision warning on exfat

Signed-off-by: Pavel Reichl <preichl@redhat.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>

common/rc

@@ -2425,6 +2425,13 @@ _format_swapfile() {
 	$MKSWAP_PROG "$fname" 2> >(grep -v 'insecure permission' >&2) >> $seqres.full
 }
 
+_swapon_file() {
+	local fname="$1"
+
+	# Ignore permission complaints on filesystems that don't support perms
+	swapon "$fname" 2> >(grep -v "insecure permissions" >&2)
+}
+
 # Check that the filesystem supports swapfiles
 _require_scratch_swapfile()
 {