Fixed to #include correct 32-bit headers; Refreshed libc/kernel headers

This patch fixes an issue where 64-bit hreaders are incorrectly included
in kernel headers.  For example, file "libc/kernel/arch-x86/asm/io.h"
incorreclty includes "io_64.h" (missing, BTW) instead of "io_32.h".

The reason is because CONFIG_X86_32 isn't considered pre-defined in
"kernel_default_arch_macros" for x86, and clean_header.py doesn't
look at it at all anyway (ie. __i386__ is also ignored, but it's
okay since x86 cross compiler defines it back)

Fixed 2 tools/*py, README.TXT, and refreshed libc/kernel headers

Change-Id: Iac834cc8b3548f055d3f2a214af36072dd679fe8
diff --git a/libc/kernel/arch-x86/asm/stat.h b/libc/kernel/arch-x86/asm/stat.h
index a4ccbe8..3878c88 100644
--- a/libc/kernel/arch-x86/asm/stat.h
+++ b/libc/kernel/arch-x86/asm/stat.h
@@ -19,111 +19,73 @@
 #ifndef _ASM_X86_STAT_H
 #define _ASM_X86_STAT_H
 #define STAT_HAVE_NSEC 1
-#ifdef __i386__
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct stat {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long st_dev;
  unsigned long st_ino;
  unsigned short st_mode;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned short st_nlink;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned short st_uid;
  unsigned short st_gid;
  unsigned long st_rdev;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long st_size;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long st_blksize;
  unsigned long st_blocks;
  unsigned long st_atime;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long st_atime_nsec;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long st_mtime;
  unsigned long st_mtime_nsec;
  unsigned long st_ctime;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long st_ctime_nsec;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long __unused4;
  unsigned long __unused5;
 };
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define STAT64_HAS_BROKEN_ST_INO 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct stat64 {
  unsigned long long st_dev;
  unsigned char __pad0[4];
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long __st_ino;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int st_mode;
  unsigned int st_nlink;
  unsigned long st_uid;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long st_gid;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long long st_rdev;
  unsigned char __pad3[4];
  long long st_size;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long st_blksize;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long long st_blocks;
  unsigned long st_atime;
  unsigned long st_atime_nsec;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long st_mtime;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int st_mtime_nsec;
  unsigned long st_ctime;
  unsigned long st_ctime_nsec;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long long st_ino;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-#else
-struct stat {
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- unsigned long st_dev;
- unsigned long st_ino;
- unsigned long st_nlink;
- unsigned int st_mode;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- unsigned int st_uid;
- unsigned int st_gid;
- unsigned int __pad0;
- unsigned long st_rdev;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- long st_size;
- long st_blksize;
- long st_blocks;
- unsigned long st_atime;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- unsigned long st_atime_nsec;
- unsigned long st_mtime;
- unsigned long st_mtime_nsec;
- unsigned long st_ctime;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- unsigned long st_ctime_nsec;
- long __unused[3];
-};
-#endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct __old_kernel_stat {
  unsigned short st_dev;
  unsigned short st_ino;
- unsigned short st_mode;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned short st_mode;
  unsigned short st_nlink;
  unsigned short st_uid;
  unsigned short st_gid;
- unsigned short st_rdev;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#ifdef __i386__
+ unsigned short st_rdev;
  unsigned long st_size;
  unsigned long st_atime;
  unsigned long st_mtime;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long st_ctime;
-#else
- unsigned int st_size;
- unsigned int st_atime;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- unsigned int st_mtime;
- unsigned int st_ctime;
-#endif
 };
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif