Update to kernel headers v4.7.2.

Change-Id: Ie38921bc18a94316dc708b9869e53c2d80c4fed1
diff --git a/original/uapi/linux/in6.h b/original/uapi/linux/in6.h
index 79b12b0..318a482 100644
--- a/original/uapi/linux/in6.h
+++ b/original/uapi/linux/in6.h
@@ -196,6 +196,7 @@
 
 #define IPV6_IPSEC_POLICY	34
 #define IPV6_XFRM_POLICY	35
+#define IPV6_HDRINCL		36
 #endif
 
 /*