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/reiserfs_fs.h b/libc/kernel/uapi/linux/reiserfs_fs.h
index 5011b11..b0ec03b 100644
--- a/libc/kernel/uapi/linux/reiserfs_fs.h
+++ b/libc/kernel/uapi/linux/reiserfs_fs.h
@@ -21,7 +21,7 @@
 #include <linux/types.h>
 #include <linux/magic.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define REISERFS_IOC_UNPACK _IOW(0xCD,1,long)
+#define REISERFS_IOC_UNPACK _IOW(0xCD, 1, long)
 #define REISERFS_IOC_GETFLAGS FS_IOC_GETFLAGS
 #define REISERFS_IOC_SETFLAGS FS_IOC_SETFLAGS
 #define REISERFS_IOC_GETVERSION FS_IOC_GETVERSION