Add PESQ precompiled tool for audio quality testing

webrtc/examples/androidtests/video_quality_loopback_test.py

 #!/usr/bin/env python
 # Copyright (c) 2017 The WebRTC 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 55 matching lines @@
     temp_dir = tempfile.mkdtemp()
   else:
     if not os.path.exists(temp_dir):
       os.makedirs(temp_dir)
 
   if not build_dir_x86:
     build_dir_x86 = os.path.join(temp_dir, 'LocalBuild')
     _RunCommand(['gn', 'gen', build_dir_x86])
     _RunCommand(['ninja', '-C', build_dir_x86, 'frame_analyzer'])
 
-  toolchain_dir = os.path.join(SRC_DIR, 'tools-webrtc',
-      'video_quality_toolchain')
+  tools_dir = os.path.join(SRC_DIR, 'tools-webrtc')
+  toolchain_dir = os.path.join(tools_dir, 'video_quality_toolchain')
 
   # Download ffmpeg and zxing.
-  download_script = os.path.join(toolchain_dir, 'download.py')
-  _RunCommand([sys.executable, download_script])
+  download_script = os.path.join(tools_dir, 'download_tools.py')
+  _RunCommand([sys.executable, download_script, toolchain_dir])
 
   # Run the Espresso code.
   test_script = os.path.join(build_dir_android,
       'bin', 'run_AppRTCMobileTestStubbedVideoIO')
   _RunCommand([sys.executable, test_script])
 
   # Pull the output video.
   test_video = os.path.join(temp_dir, 'test_video.y4m')
   _RunCommand(['adb', 'pull', '/sdcard/output.y4m', test_video])
 
@@ skipping 36 matching lines @@
       '--stats_file_ref', stats_file_ref,
       '--stats_file_test', stats_file_test, '--frame_analyzer', frame_analyzer,
       '--ffmpeg_path', ffmpeg_path, '--zxing_path', zxing_path])
 
   shutil.rmtree(temp_dir)
 
 
 if __name__ == '__main__':
   sys.exit(main())