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/nfs2.h b/libc/kernel/uapi/linux/nfs2.h
index 31d731b..10aafe9 100644
--- a/libc/kernel/uapi/linux/nfs2.h
+++ b/libc/kernel/uapi/linux/nfs2.h
@@ -27,7 +27,7 @@
 #define NFS2_FHSIZE 32
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS2_COOKIESIZE 4
-#define NFS2_FIFO_DEV (-1)
+#define NFS2_FIFO_DEV (- 1)
 #define NFS2MODE_FMT 0170000
 #define NFS2MODE_DIR 0040000
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
@@ -39,21 +39,21 @@
 #define NFS2MODE_SOCK 0140000
 #define NFS2MODE_FIFO 0010000
 enum nfs2_ftype {
- NF2NON = 0,
+  NF2NON = 0,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- NF2REG = 1,
- NF2DIR = 2,
- NF2BLK = 3,
- NF2CHR = 4,
+  NF2REG = 1,
+  NF2DIR = 2,
+  NF2BLK = 3,
+  NF2CHR = 4,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- NF2LNK = 5,
- NF2SOCK = 6,
- NF2BAD = 7,
- NF2FIFO = 8
+  NF2LNK = 5,
+  NF2SOCK = 6,
+  NF2BAD = 7,
+  NF2FIFO = 8
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 struct nfs2_fh {
- char data[NFS2_FHSIZE];
+  char data[NFS2_FHSIZE];
 };
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS2_VERSION 2