Update kernel headers to v3.14.

Other changes:
- Modify update_all.py to skip ion header files when importing into aosp.
- Fix generate_uapi_headers.sh to handle imports from a linux-stable kernel.

Change-Id: I1ad81b9ccb063c21740f9875f2cc1238052cd4b3
diff --git a/libc/kernel/uapi/linux/dm-log-userspace.h b/libc/kernel/uapi/linux/dm-log-userspace.h
index 45a57f3..47d45f7 100644
--- a/libc/kernel/uapi/linux/dm-log-userspace.h
+++ b/libc/kernel/uapi/linux/dm-log-userspace.h
@@ -43,7 +43,7 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define DM_ULOG_REQUEST_MASK 0xFF
 #define DM_ULOG_REQUEST_TYPE(request_type)   (DM_ULOG_REQUEST_MASK & (request_type))
-#define DM_ULOG_REQUEST_VERSION 2
+#define DM_ULOG_REQUEST_VERSION 3
 struct dm_ulog_request {
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  uint64_t luid;