Update testing tools (AppRTC, Go) to new versions

webrtc/tools/testing/build_mercurial_local.py

Index: webrtc/tools/testing/build_mercurial_local.py
diff --git a/webrtc/tools/testing/build_mercurial_local.py b/webrtc/tools/testing/build_mercurial_local.py
deleted file mode 100755
index 512ca78d3e0321df52290cee59ccad0cf6fb0439..0000000000000000000000000000000000000000
--- a/webrtc/tools/testing/build_mercurial_local.py
+++ /dev/null
@@ -1,47 +0,0 @@
-#!/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.
-
-"""Builds a local mercurial (hg) copy.
-
-This is used by the go toolchain.
-"""
-
-import os
-import subprocess
-import sys
-
-import utils
-
-
-def main(argv):
-  if len(argv) != 2:
-    return 'Usage: %s <mercurial_dir>' % argv[0]
-
-  mercurial_dir = argv[1]
-  if not os.path.exists(mercurial_dir):
-    return 'Expected mercurial at {}.'.format(mercurial_dir)
-
-  os.chdir(mercurial_dir)
-
-  if utils.GetPlatform() == 'win':
-    subprocess.check_call(['python', 'setup.py', '--pure', 'build_py', '-c',
-                           '-d', '.', 'build_ext',
-                           '-i', 'build_mo', '--force'])
-    with open('hg.bat', 'w') as put_hg_in_path:
-      # Write a hg.bat since the go toolchain expects to find something called
-      # 'hg' in the path, but Windows only recognizes executables ending with
-      # an extension in PATHEXT. Writing hg.bat effectively makes 'hg' callable
-      # if the mercurial folder is in PATH.
-      mercurial_path = os.path.abspath('hg')
-      put_hg_in_path.write('python %s %%*' % mercurial_path)
-  else:
-    subprocess.check_call(['make', 'local'])
-
-if __name__ == '__main__':
-  sys.exit(main(sys.argv))