iptables: add kernel depends for basic functionality

package/iptables/Makefile

@@ -10,6 +10,8 @@ PKG_HASH:=		4bb72a0a0b18b5a9e79e87631ddc4084528e5df236bc7624472dcaa8480f1c60
 PKG_DESCR:=		netfilter firewalling software
 PKG_SECTION:=		net/firewall
 PKG_DEPENDS:=		libnetfilter_conntrack libmnl libnfnetlink
+PKG_KDEPENDS:=		ip-nf-iptables ip-nf-filter ip-nf-nat nf-conntrack-ipv4
+PKG_KDEPENDS+=		ip-nf-target-reject ip-nf-target-masquerade
 PKG_BUILDDEP:=		libnetfilter_conntrack pkgconf-host
 PKG_URL:=		http://www.netfilter.org/
 PKG_SITES:=		http://www.netfilter.org/projects/iptables/files/