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/android_alarm.h b/libc/kernel/uapi/linux/android_alarm.h
index d0111b2..801a01e 100644
--- a/libc/kernel/uapi/linux/android_alarm.h
+++ b/libc/kernel/uapi/linux/android_alarm.h
@@ -22,37 +22,34 @@
 #include <linux/time.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 enum android_alarm_type {
- ANDROID_ALARM_RTC_WAKEUP,
- ANDROID_ALARM_RTC,
- ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP,
+  ANDROID_ALARM_RTC_WAKEUP,
+  ANDROID_ALARM_RTC,
+  ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- ANDROID_ALARM_ELAPSED_REALTIME,
- ANDROID_ALARM_SYSTEMTIME,
- ANDROID_ALARM_TYPE_COUNT,
+  ANDROID_ALARM_ELAPSED_REALTIME,
+  ANDROID_ALARM_SYSTEMTIME,
+  ANDROID_ALARM_TYPE_COUNT,
 };
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 enum android_alarm_return_flags {
- ANDROID_ALARM_RTC_WAKEUP_MASK = 1U << ANDROID_ALARM_RTC_WAKEUP,
- ANDROID_ALARM_RTC_MASK = 1U << ANDROID_ALARM_RTC,
- ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK =
+  ANDROID_ALARM_RTC_WAKEUP_MASK = 1U << ANDROID_ALARM_RTC_WAKEUP,
+  ANDROID_ALARM_RTC_MASK = 1U << ANDROID_ALARM_RTC,
+  ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK = 1U << ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- 1U << ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP,
- ANDROID_ALARM_ELAPSED_REALTIME_MASK =
- 1U << ANDROID_ALARM_ELAPSED_REALTIME,
- ANDROID_ALARM_SYSTEMTIME_MASK = 1U << ANDROID_ALARM_SYSTEMTIME,
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- ANDROID_ALARM_TIME_CHANGE_MASK = 1U << 16
+  ANDROID_ALARM_ELAPSED_REALTIME_MASK = 1U << ANDROID_ALARM_ELAPSED_REALTIME,
+  ANDROID_ALARM_SYSTEMTIME_MASK = 1U << ANDROID_ALARM_SYSTEMTIME,
+  ANDROID_ALARM_TIME_CHANGE_MASK = 1U << 16
 };
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ANDROID_ALARM_CLEAR(type) _IO('a', 0 | ((type) << 4))
 #define ANDROID_ALARM_WAIT _IO('a', 1)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define ALARM_IOW(c, type, size) _IOW('a', (c) | ((type) << 4), size)
+#define ALARM_IOW(c,type,size) _IOW('a', (c) | ((type) << 4), size)
 #define ANDROID_ALARM_SET(type) ALARM_IOW(2, type, struct timespec)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ANDROID_ALARM_SET_AND_WAIT(type) ALARM_IOW(3, type, struct timespec)
 #define ANDROID_ALARM_GET_TIME(type) ALARM_IOW(4, type, struct timespec)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ANDROID_ALARM_SET_RTC _IOW('a', 5, struct timespec)
 #define ANDROID_ALARM_BASE_CMD(cmd) (cmd & ~(_IOC(0, 0, 0xf0, 0)))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ANDROID_ALARM_IOCTL_TO_TYPE(cmd) (_IOC_NR(cmd) >> 4)
 #endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */