libvpx: Pull from upstream

source/libvpx/test/simple_encoder.sh

 #!/bin/sh
 ##
 ##  Copyright (c) 2014 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.
 ##
@@ skipping 11 matching lines @@
     return 1
   fi
 }
 
 # Runs simple_encoder using the codec specified by $1.
 simple_encoder() {
   local encoder="${LIBVPX_BIN_PATH}/simple_encoder${VPX_TEST_EXE_SUFFIX}"
   local codec="$1"
   local output_file="${VPX_TEST_OUTPUT_DIR}/simple_encoder_${codec}.ivf"
 
-  [ -x "${encoder}" ] || return 1
+  if [ ! -x "${encoder}" ]; then
+    elog "${encoder} does not exist or is not executable."
+    return 1
+  fi
 
   eval "${encoder}" "${codec}" "${YUV_RAW_INPUT_WIDTH}" \
       "${YUV_RAW_INPUT_HEIGHT}" "${YUV_RAW_INPUT}" "${output_file}" 9999 \
       ${devnull}
 
   [ -e "${output_file}" ] || return 1
 }
 
 simple_encoder_vp8() {
   if [ "$(vp8_encode_available)" = "yes" ]; then
     simple_encoder vp8 || return 1
   fi
 }
 
 # TODO(tomfinegan): Add a frame limit param to simple_encoder and enable this
 # test. VP9 is just too slow right now: This test takes 4m30s+ on a fast
 # machine.
 DISABLED_simple_encoder_vp9() {
   if [ "$(vp9_encode_available)" = "yes" ]; then
     simple_encoder vp9 || return 1
   fi
 }
 
 simple_encoder_tests="simple_encoder_vp8
                       DISABLED_simple_encoder_vp9"
 
 run_tests simple_encoder_verify_environment "${simple_encoder_tests}"