Update to kernel headers v4.12.3.

Test: NA
Change-Id: Iee3d607e8a0fe866ffa1f123308af0713719ea29
diff --git a/original/uapi/linux/neighbour.h b/original/uapi/linux/neighbour.h
index bd99a8d..f3d16db 100644
--- a/original/uapi/linux/neighbour.h
+++ b/original/uapi/linux/neighbour.h
@@ -26,6 +26,7 @@
 	NDA_IFINDEX,
 	NDA_MASTER,
 	NDA_LINK_NETNSID,
+	NDA_SRC_VNI,
 	__NDA_MAX
 };