message: Append hostconfig info to build directory in build_src script
  To avoid a race condition when called from CI.
diff: @@ -147,6 +147,7 @@ def main():
  return 1
  test_root = get_build_and_test_root(repo_dir, timestamp)
  + test_root = "{0}_{1}".format(test_root, hostconfig.replace(".cmake", "").replace("@","_"))
  os.mkdir(test_root)
  res = build_and_test_host_config(test_root, hostconfig_path, opts["verbose"], opts["extra_cmake_options"])
  