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/dvb/net.h b/libc/kernel/uapi/linux/dvb/net.h
index 48308d7..f085dc3 100644
--- a/libc/kernel/uapi/linux/dvb/net.h
+++ b/libc/kernel/uapi/linux/dvb/net.h
@@ -21,9 +21,9 @@
 #include <linux/types.h>
 struct dvb_net_if {
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- __u16 pid;
- __u16 if_num;
- __u8 feedtype;
+  __u16 pid;
+  __u16 if_num;
+  __u8 feedtype;
 #define DVB_NET_FEEDTYPE_MPE 0
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define DVB_NET_FEEDTYPE_ULE 1
@@ -33,8 +33,8 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NET_GET_IF _IOWR('o', 54, struct dvb_net_if)
 struct __dvb_net_if_old {
- __u16 pid;
- __u16 if_num;
+  __u16 pid;
+  __u16 if_num;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 #define __NET_ADD_IF_OLD _IOWR('o', 52, struct __dvb_net_if_old)