fix some runtime dependencies

package/iptables/Makefile

@@ -9,7 +9,7 @@ PKG_RELEASE:=		6
 PKG_MD5SUM:=		536d048c8e8eeebcd9757d0863ebb0c0
 PKG_DESCR:=		netfilter firewalling software
 PKG_SECTION:=		firewall
-PKG_DEPENDS:=		libnetfilter_conntrack
+PKG_DEPENDS:=		libnetfilter_conntrack libmnl libnfnetlink
 PKG_BUILDDEP:=		autotool libnetfilter_conntrack
 PKG_URL:=		http://www.netfilter.org/
 PKG_SITES:=		http://www.netfilter.org/projects/iptables/files/