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/linux/termios.h b/libc/kernel/uapi/linux/termios.h
index 2ac0083..0e7a391 100644
--- a/libc/kernel/uapi/linux/termios.h
+++ b/libc/kernel/uapi/linux/termios.h
@@ -22,18 +22,17 @@
 #include <asm/termios.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFF 5
-struct termiox
-{
- __u16 x_hflag;
+struct termiox {
+  __u16 x_hflag;
+  __u16 x_cflag;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- __u16 x_cflag;
- __u16 x_rflag[NFF];
- __u16 x_sflag;
+  __u16 x_rflag[NFF];
+  __u16 x_sflag;
 };
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define RTSXOFF 0x0001
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define CTSXON 0x0002
 #define DTRXOFF 0x0004
 #define DSRXON 0x0008
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */