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/asm-generic/socket.h b/libc/kernel/uapi/asm-generic/socket.h
index 997db00..93daf83 100644
--- a/libc/kernel/uapi/asm-generic/socket.h
+++ b/libc/kernel/uapi/asm-generic/socket.h
@@ -86,4 +86,8 @@
 #define SO_LOCK_FILTER 44
 #define SO_SELECT_ERR_QUEUE 45
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SO_BUSY_POLL 46
+#define SO_MAX_PACING_RATE 47
+#define SO_BPF_EXTENSIONS 48
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */