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/mqueue.h b/libc/kernel/uapi/linux/mqueue.h
index 4599cdc..45f3a18 100644
--- a/libc/kernel/uapi/linux/mqueue.h
+++ b/libc/kernel/uapi/linux/mqueue.h
@@ -22,12 +22,12 @@
 #define MQ_BYTES_MAX 819200
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct mq_attr {
- __kernel_long_t mq_flags;
- __kernel_long_t mq_maxmsg;
- __kernel_long_t mq_msgsize;
+  __kernel_long_t mq_flags;
+  __kernel_long_t mq_maxmsg;
+  __kernel_long_t mq_msgsize;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- __kernel_long_t mq_curmsgs;
- __kernel_long_t __reserved[4];
+  __kernel_long_t mq_curmsgs;
+  __kernel_long_t __reserved[4];
 };
 #define NOTIFY_NONE 0
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */