libvpx: Pull from upstream

source/libvpx/vpx_ports/arm.h

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 
 #ifndef VPX_PORTS_ARM_H_
 #define VPX_PORTS_ARM_H_
 #include <stdlib.h>
 #include "vpx_config.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /*ARMv5TE "Enhanced DSP" instructions.*/
 #define HAS_EDSP  0x01
 /*ARMv6 "Parallel" or "Media" instructions.*/
 #define HAS_MEDIA 0x02
 /*ARMv7 optional NEON instructions.*/
 #define HAS_NEON  0x04
 
 int arm_cpu_caps(void);
 
+// Earlier gcc compilers have issues with some neon intrinsics
+#if !defined(__clang__) && defined(__GNUC__) && \
+    __GNUC__ == 4 && __GNUC_MINOR__ <= 6
+#define VPX_INCOMPATIBLE_GCC
+#endif
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // VPX_PORTS_ARM_H_