message: add poll EINTR
diff: @@ -1395,7 +1395,10 @@ PHP_FUNCTION(swoole_client_select) {
  RETURN_FALSE;
  }
  + do {
  retval = poll(fds, maxevents, (int) (timeout * 1000));
  + } while (retval < 0 && errno == EINTR);
  +
  if (retval == -1) {
  efree(fds);
  php_swoole_sys_error(E_WARNING, "unable to poll()");
  