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-mips/asm/ucontext.h b/libc/kernel/uapi/asm-mips/asm/ucontext.h
index aa4d67d..16c9487 100644
--- a/libc/kernel/uapi/asm-mips/asm/ucontext.h
+++ b/libc/kernel/uapi/asm-mips/asm/ucontext.h
@@ -16,4 +16,30 @@
  ***
  ****************************************************************************
  ****************************************************************************/
-#include <asm-generic/ucontext.h>
+#ifndef __MIPS_UAPI_ASM_UCONTEXT_H
+#define __MIPS_UAPI_ASM_UCONTEXT_H
+struct extcontext {
+  unsigned int magic;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  unsigned int size;
+};
+struct msa_extcontext {
+  struct extcontext ext;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MSA_EXTCONTEXT_MAGIC 0x784d5341
+  unsigned long long wr[32];
+  unsigned int csr;
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define END_EXTCONTEXT_MAGIC 0x78454e44
+struct ucontext {
+  unsigned long uc_flags;
+  struct ucontext * uc_link;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  stack_t uc_stack;
+  struct sigcontext uc_mcontext;
+  sigset_t uc_sigmask;
+  unsigned long long uc_extcontext[0];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+#endif