Switch kernel header parsing to python libclang

Replace the tokenizer in cpp.py with libclang.

Bug: 18937958
Change-Id: I27630904c6d2849418cd5ca3d3c612ec3078686d
diff --git a/libc/kernel/uapi/asm-arm/asm/a.out.h b/libc/kernel/uapi/asm-arm/asm/a.out.h
index 54b30ac..3d51506 100644
--- a/libc/kernel/uapi/asm-arm/asm/a.out.h
+++ b/libc/kernel/uapi/asm-arm/asm/a.out.h
@@ -21,28 +21,26 @@
 #include <linux/personality.h>
 #include <linux/types.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-struct exec
-{
- __u32 a_info;
- __u32 a_text;
+struct exec {
+  __u32 a_info;
+  __u32 a_text;
+  __u32 a_data;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- __u32 a_data;
- __u32 a_bss;
- __u32 a_syms;
- __u32 a_entry;
+  __u32 a_bss;
+  __u32 a_syms;
+  __u32 a_entry;
+  __u32 a_trsize;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- __u32 a_trsize;
- __u32 a_drsize;
+  __u32 a_drsize;
 };
 #define N_TXTADDR(a) (0x00008000)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define N_TRSIZE(a) ((a).a_trsize)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define N_DRSIZE(a) ((a).a_drsize)
 #define N_SYMSIZE(a) ((a).a_syms)
 #define M_ARM 103
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifndef LIBRARY_START_TEXT
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define LIBRARY_START_TEXT (0x00c00000)
 #endif
 #endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */