Update headers to 2.6.26

Copy santized version of headers from 2.6.26 final version.

include/linux/netfilter_ipv4/ip_tables.h

@@ -15,6 +15,7 @@
 #ifndef _IPTABLES_H
 #define _IPTABLES_H
 
+#include <linux/types.h>
 #include <linux/netfilter_ipv4.h>
 
 #include <linux/netfilter/x_tables.h>

include/linux/xfrm.h

@@ -339,6 +339,7 @@ struct xfrm_usersa_info {
 #define XFRM_STATE_NOPMTUDISC	4
 #define XFRM_STATE_WILDRECV	8
 #define XFRM_STATE_ICMP		16
+#define XFRM_STATE_AF_UNSPEC	32
 };
 
 struct xfrm_usersa_id {