[NETFILTER]: CONNMARK target needs ip_conntrack

There's a missing dependency from the CONNMARK target to ip_conntrack.
Signed-off-by: Pablo Neira Ayuso <pablo@eurodev.net>
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>

net/ipv4/netfilter/ipt_CONNMARK.c

@@ -109,6 +109,7 @@ static struct ipt_target ipt_connmark_reg = {
 
 static int __init init(void)
 {
+	need_ip_conntrack();
 	return ipt_register_target(&ipt_connmark_reg);
 }