firewall: add missing dependencies

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 37224

package/network/config/firewall/Makefile

@@ -26,7 +26,7 @@ define Package/firewall
   SECTION:=net
   CATEGORY:=Base system
   TITLE:=OpenWrt C Firewall
-  DEPENDS:=+libubox +libubus +libuci +libip4tc +IPV6:libip6tc +libxtables
+  DEPENDS:=+libubox +libubus +libuci +libip4tc +IPV6:libip6tc +libxtables +kmod-ipt-core +kmod-ipt-nat
 endef
 
 define Package/firewall/description