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-arm64/asm/hwcap.h b/libc/kernel/uapi/asm-arm64/asm/hwcap.h
index 539b725..ccea53d 100644
--- a/libc/kernel/uapi/asm-arm64/asm/hwcap.h
+++ b/libc/kernel/uapi/asm-arm64/asm/hwcap.h
@@ -21,4 +21,11 @@
 #define HWCAP_FP (1 << 0)
 #define HWCAP_ASIMD (1 << 1)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HWCAP_EVTSTRM (1 << 2)
+#define HWCAP_AES (1 << 3)
+#define HWCAP_PMULL (1 << 4)
+#define HWCAP_SHA1 (1 << 5)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HWCAP_SHA2 (1 << 6)
+#define HWCAP_CRC32 (1 << 7)
 #endif