Update headers to 2.6.26

Copy santized version of headers from 2.6.26 final version.
diff --git a/include/linux/netfilter_ipv4/ip_tables.h b/include/linux/netfilter_ipv4/ip_tables.h
index fc64b97..c42c73f 100644
--- a/include/linux/netfilter_ipv4/ip_tables.h
+++ b/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>
diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index 132ba87..7af0aa4 100644
--- a/include/linux/xfrm.h
+++ b/include/linux/xfrm.h
@@ -339,6 +339,7 @@
 #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 {