Unicode file/dir name bug fix

[wellshsu]

• add 'utf8_to_gb' func into commands.cpp

  static std::string utf8_to_gb(const char* str)
  {
  std::string result;
  WCHAR* strSrc;
  LPSTR szRes;
  
  int i = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);
  strSrc = new WCHAR[i + 1];
  MultiByteToWideChar(CP_UTF8, 0, str, -1, strSrc, i);
  
  i = WideCharToMultiByte(CP_ACP, 0, strSrc, -1, NULL, 0, NULL, NULL);
  szRes = new CHAR[i + 1];
  WideCharToMultiByte(CP_ACP, 0, strSrc, -1, szRes, i, NULL, NULL);
  
  result = szRes;
  delete[]strSrc;
  delete[]szRes;
  
  return result;
  }

• modify 'get_encrypted_files' func in commands.cpp

  while (ls_files_stdout->peek() != -1) {
      std::string     mode;
      std::string     object_id;
      std::string     stage;
      std::string     filename;
      *ls_files_stdout >> mode >> object_id >> stage >> std::ws;
      std::getline(*ls_files_stdout, filename, '\0');
      filename = utf8_to_gb(filename.c_str()).c_str();

• modify 'status' func in commands.cpp

  while (output.peek() != -1) {
      std::string     tag;
      std::string     object_id;
      std::string     filename;
      output >> tag;
      if (tag != "?") {
          std::string mode;
          std::string stage;
          output >> mode >> object_id >> stage;
          if (!is_git_file_mode(mode)) {
              continue;
          }
      }
      output >> std::ws;
      std::getline(output, filename, '\0');
      filename = utf8_to_gb(filename.c_str()).c_str();

• rebuild binary and done.