Update to kernel headers v4.7.2.

Change-Id: Ie38921bc18a94316dc708b9869e53c2d80c4fed1
diff --git a/original/uapi/linux/if.h b/original/uapi/linux/if.h
index 752f5dc..e601c8c 100644
--- a/original/uapi/linux/if.h
+++ b/original/uapi/linux/if.h
@@ -43,7 +43,7 @@
  * are shared for all types of net_devices. The sysfs entries are available
  * via /sys/class/net/<dev>/flags. Flags which can be toggled through sysfs
  * are annotated below, note that only a few flags can be toggled and some
- * other flags are always always preserved from the original net_device flags
+ * other flags are always preserved from the original net_device flags
  * even if you try to set them via sysfs. Flags which are always preserved
  * are kept under the flag grouping @IFF_VOLATILE. Flags which are volatile
  * are annotated below as such.