message: fix logic in GetFilesInFolderHelper from DFS-ification in
diff: @@ -167,7 +167,7 @@ static void GetFilesInFolderHelper(
  if (file.name[0] != '.') {
  if (file.is_dir) {
  if (recursive) {
  - std::string child_dir = output_prefix + file.name + "/";
  + std::string child_dir = q.front().second + file.name + "/";
  if (!IsSymLink(child_dir))
  q.push(make_pair(file.path, child_dir));
  }
  