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/sock_diag.h b/libc/kernel/uapi/linux/sock_diag.h
index 4d9e440..39fa6c1 100644
--- a/libc/kernel/uapi/linux/sock_diag.h
+++ b/libc/kernel/uapi/linux/sock_diag.h
@@ -21,34 +21,36 @@
 #include <linux/types.h>
 #define SOCK_DIAG_BY_FAMILY 20
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SOCK_DESTROY 21
 struct sock_diag_req {
   __u8 sdiag_family;
   __u8 sdiag_protocol;
-};
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
 enum {
   SK_MEMINFO_RMEM_ALLOC,
   SK_MEMINFO_RCVBUF,
-  SK_MEMINFO_WMEM_ALLOC,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  SK_MEMINFO_WMEM_ALLOC,
   SK_MEMINFO_SNDBUF,
   SK_MEMINFO_FWD_ALLOC,
   SK_MEMINFO_WMEM_QUEUED,
-  SK_MEMINFO_OPTMEM,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  SK_MEMINFO_OPTMEM,
   SK_MEMINFO_BACKLOG,
+  SK_MEMINFO_DROPS,
   SK_MEMINFO_VARS,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 enum sknetlink_groups {
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
   SKNLGRP_NONE,
   SKNLGRP_INET_TCP_DESTROY,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
   SKNLGRP_INET_UDP_DESTROY,
   SKNLGRP_INET6_TCP_DESTROY,
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
   SKNLGRP_INET6_UDP_DESTROY,
   __SKNLGRP_MAX,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 #define SKNLGRP_MAX (__SKNLGRP_MAX - 1)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif