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/v4l2-common.h b/libc/kernel/uapi/linux/v4l2-common.h
index eaf3bfc..a379a7e 100644
--- a/libc/kernel/uapi/linux/v4l2-common.h
+++ b/libc/kernel/uapi/linux/v4l2-common.h
@@ -44,12 +44,12 @@
 #define V4L2_SUBDEV_SEL_FLAG_SIZE_LE V4L2_SEL_FLAG_LE
 #define V4L2_SUBDEV_SEL_FLAG_KEEP_CONFIG V4L2_SEL_FLAG_KEEP_CONFIG
 struct v4l2_edid {
- __u32 pad;
+  __u32 pad;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- __u32 start_block;
- __u32 blocks;
- __u32 reserved[5];
- __u8 *edid;
+  __u32 start_block;
+  __u32 blocks;
+  __u32 reserved[5];
+  __u8 * edid;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 #endif