Update to kernel headers v4.7.2.

Modify the kernel header update script to rename C++ keyword
struct members to something else. This fixes problems when including
these kernel files in C++ code.

Also, make a manual change to linux/fib_rules.h and comment out the
value FRA_PAD since it conflicts with a special android kernel value
FRA_UID_START that has not been upstreamed yet.

Test: Built aosp_angler, aosp_x86_64, aosp_mips (bionic only)
Test: Booted on angler and ran bionic unit tests
Test: Built these changes in internal master

Change-Id: Ia22b7e3ca409404696dba76311f49157f4a9ceed
diff --git a/libc/kernel/uapi/sound/asound.h b/libc/kernel/uapi/sound/asound.h
index 0dfff8b..7e5dd3f 100644
--- a/libc/kernel/uapi/sound/asound.h
+++ b/libc/kernel/uapi/sound/asound.h
@@ -18,7 +18,12 @@
  ****************************************************************************/
 #ifndef _UAPI__SOUND_ASOUND_H
 #define _UAPI__SOUND_ASOUND_H
+#ifdef __linux__
 #include <linux/types.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#else
+#include <sys/ioctl.h>
+#endif
 #include <stdlib.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SNDRV_PROTOCOL_VERSION(major,minor,subminor) (((major) << 16) | ((minor) << 8) | (subminor))