make policy match compile independant of kernel headers
diff --git a/extensions/libip6t_policy.c b/extensions/libip6t_policy.c
index 74912b4..2f4453e 100644
--- a/extensions/libip6t_policy.c
+++ b/extensions/libip6t_policy.c
@@ -14,7 +14,7 @@
 #include <ip6tables.h>
 
 #include <linux/netfilter_ipv6/ip6_tables.h>
-#include <linux/netfilter_ipv6/ip6t_policy.h>
+#include "../include/linux/netfilter_ipv6/ip6t_policy.h"
 
 /*
  * HACK: global pointer to current matchinfo for making