make sure uci firewall reverts its states when stopped

SVN-Revision: 12403

package/firewall/files/uci_firewall.sh

@@ -323,4 +323,5 @@ fw_stop() {
 	$IPTABLES -P INPUT ACCEPT
 	$IPTABLES -P OUTPUT ACCEPT
 	$IPTABLES -P FORWARD ACCEPT
+	uci_revert_state firewall core
 }