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/ivtvfb.h b/libc/kernel/uapi/linux/ivtvfb.h
index 90a5881..749ae83 100644
--- a/libc/kernel/uapi/linux/ivtvfb.h
+++ b/libc/kernel/uapi/linux/ivtvfb.h
@@ -22,10 +22,10 @@
 #include <linux/types.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct ivtvfb_dma_frame {
- void __user *source;
- unsigned long dest_offset;
- int count;
+  void __user * source;
+  unsigned long dest_offset;
+  int count;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-#define IVTVFB_IOC_DMA_FRAME _IOW('V', BASE_VIDIOC_PRIVATE+0, struct ivtvfb_dma_frame)
+#define IVTVFB_IOC_DMA_FRAME _IOW('V', BASE_VIDIOC_PRIVATE + 0, struct ivtvfb_dma_frame)
 #endif