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/ipsec.h b/libc/kernel/uapi/linux/ipsec.h
index e9758eb..d207cf0 100644
--- a/libc/kernel/uapi/linux/ipsec.h
+++ b/libc/kernel/uapi/linux/ipsec.h
@@ -24,37 +24,37 @@
 #define IPSEC_ULPROTO_ANY 255
 #define IPSEC_PROTO_ANY 255
 enum {
- IPSEC_MODE_ANY = 0,
+  IPSEC_MODE_ANY = 0,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IPSEC_MODE_TRANSPORT = 1,
- IPSEC_MODE_TUNNEL = 2,
- IPSEC_MODE_BEET = 3
+  IPSEC_MODE_TRANSPORT = 1,
+  IPSEC_MODE_TUNNEL = 2,
+  IPSEC_MODE_BEET = 3
 };
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 enum {
- IPSEC_DIR_ANY = 0,
- IPSEC_DIR_INBOUND = 1,
- IPSEC_DIR_OUTBOUND = 2,
+  IPSEC_DIR_ANY = 0,
+  IPSEC_DIR_INBOUND = 1,
+  IPSEC_DIR_OUTBOUND = 2,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IPSEC_DIR_FWD = 3,
- IPSEC_DIR_MAX = 4,
- IPSEC_DIR_INVALID = 5
+  IPSEC_DIR_FWD = 3,
+  IPSEC_DIR_MAX = 4,
+  IPSEC_DIR_INVALID = 5
 };
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 enum {
- IPSEC_POLICY_DISCARD = 0,
- IPSEC_POLICY_NONE = 1,
- IPSEC_POLICY_IPSEC = 2,
+  IPSEC_POLICY_DISCARD = 0,
+  IPSEC_POLICY_NONE = 1,
+  IPSEC_POLICY_IPSEC = 2,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IPSEC_POLICY_ENTRUST = 3,
- IPSEC_POLICY_BYPASS = 4
+  IPSEC_POLICY_ENTRUST = 3,
+  IPSEC_POLICY_BYPASS = 4
 };
 enum {
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IPSEC_LEVEL_DEFAULT = 0,
- IPSEC_LEVEL_USE = 1,
- IPSEC_LEVEL_REQUIRE = 2,
- IPSEC_LEVEL_UNIQUE = 3
+  IPSEC_LEVEL_DEFAULT = 0,
+  IPSEC_LEVEL_USE = 1,
+  IPSEC_LEVEL_REQUIRE = 2,
+  IPSEC_LEVEL_UNIQUE = 3
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 #define IPSEC_MANUAL_REQID_MAX 0x3fff