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-arm/asm/unistd.h b/libc/kernel/uapi/asm-arm/asm/unistd.h
index 468f50a..45bae1e 100644
--- a/libc/kernel/uapi/asm-arm/asm/unistd.h
+++ b/libc/kernel/uapi/asm-arm/asm/unistd.h
@@ -469,27 +469,31 @@
 #define __NR_userfaultfd (__NR_SYSCALL_BASE + 388)
 #define __NR_membarrier (__NR_SYSCALL_BASE + 389)
 #define __NR_mlock2 (__NR_SYSCALL_BASE + 390)
-#define __ARM_NR_BASE (__NR_SYSCALL_BASE + 0x0f0000)
+#define __NR_copy_file_range (__NR_SYSCALL_BASE + 391)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define __NR_preadv2 (__NR_SYSCALL_BASE + 392)
+#define __NR_pwritev2 (__NR_SYSCALL_BASE + 393)
+#define __ARM_NR_BASE (__NR_SYSCALL_BASE + 0x0f0000)
 #define __ARM_NR_breakpoint (__ARM_NR_BASE + 1)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __ARM_NR_cacheflush (__ARM_NR_BASE + 2)
 #define __ARM_NR_usr26 (__ARM_NR_BASE + 3)
 #define __ARM_NR_usr32 (__ARM_NR_BASE + 4)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __ARM_NR_set_tls (__ARM_NR_BASE + 5)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #undef __NR_time
 #undef __NR_umount
 #undef __NR_stime
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #undef __NR_alarm
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #undef __NR_utime
 #undef __NR_getrlimit
 #undef __NR_select
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #undef __NR_readdir
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #undef __NR_mmap
 #undef __NR_socketcall
 #undef __NR_syscall
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #undef __NR_ipc
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif