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/asm-generic/mman-common.h b/libc/kernel/uapi/asm-generic/mman-common.h
index 00075c7..5c28f15 100644
--- a/libc/kernel/uapi/asm-generic/mman-common.h
+++ b/libc/kernel/uapi/asm-generic/mman-common.h
@@ -46,21 +46,23 @@
 #define MADV_WILLNEED 3
 #define MADV_DONTNEED 4
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MADV_FREE 8
 #define MADV_REMOVE 9
 #define MADV_DONTFORK 10
 #define MADV_DOFORK 11
-#define MADV_HWPOISON 100
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MADV_HWPOISON 100
 #define MADV_SOFT_OFFLINE 101
 #define MADV_MERGEABLE 12
 #define MADV_UNMERGEABLE 13
-#define MADV_HUGEPAGE 14
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MADV_HUGEPAGE 14
 #define MADV_NOHUGEPAGE 15
 #define MADV_DONTDUMP 16
 #define MADV_DODUMP 17
-#define MAP_FILE 0
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MAP_FILE 0
 #define MAP_HUGE_SHIFT 26
 #define MAP_HUGE_MASK 0x3f
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */