message: update statusCode to 500 when http response is abnormal
diff: @@ -2594,6 +2594,8 @@ static PHP_METHOD(swoole_http_response, __destruct)
  }
  else
  {
  + context->response.status = 500;
  +
  zval *zobject = getThis();
  zval *retval = NULL;
  sw_zend_call_method_with_0_params(&zobject, swoole_http_response_class_entry_ptr, NULL, "end", &retval);
  