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/linux/fib_rules.h b/libc/kernel/uapi/linux/fib_rules.h
index fdc3577..0268826 100644
--- a/libc/kernel/uapi/linux/fib_rules.h
+++ b/libc/kernel/uapi/linux/fib_rules.h
@@ -68,24 +68,30 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
   FRA_FWMASK,
   FRA_OIFNAME,
+  /* MANUAL CHANGE:
+   * Temporarily remove this define since it conflicts with the android
+   * kernel value FRA_UID_START that has not been upstreamed yet.
+  FRA_PAD,
+   */
   __FRA_MAX
-};
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
 #define FRA_MAX (__FRA_MAX - 1)
 enum {
   FR_ACT_UNSPEC,
-  FR_ACT_TO_TBL,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  FR_ACT_TO_TBL,
   FR_ACT_GOTO,
   FR_ACT_NOP,
   FR_ACT_RES3,
-  FR_ACT_RES4,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  FR_ACT_RES4,
   FR_ACT_BLACKHOLE,
   FR_ACT_UNREACHABLE,
   FR_ACT_PROHIBIT,
-  __FR_ACT_MAX,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __FR_ACT_MAX,
 };
 #define FR_ACT_MAX (__FR_ACT_MAX - 1)
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */