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/n_r3964.h b/libc/kernel/uapi/linux/n_r3964.h
index e1cff31..c922acf 100644
--- a/libc/kernel/uapi/linux/n_r3964.h
+++ b/libc/kernel/uapi/linux/n_r3964.h
@@ -32,18 +32,22 @@
 #define R3964_SIG_NONE 0x0000
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define R3964_USE_SIGIO 0x1000
-enum {R3964_MSG_ACK=1, R3964_MSG_DATA };
+enum {
+  R3964_MSG_ACK = 1,
+  R3964_MSG_DATA
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
 #define R3964_MAX_MSG_COUNT 32
 #define R3964_OK 0
+#define R3964_TX_FAIL - 1
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define R3964_TX_FAIL -1
-#define R3964_OVERFLOW -2
+#define R3964_OVERFLOW - 2
 struct r3964_client_message {
- int msg_id;
+  int msg_id;
+  int arg;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- int arg;
- int error_code;
+  int error_code;
 };
 #define R3964_MTU 256
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */