message: update the log output function
diff: @@ -261,7 +261,7 @@ static int swoole_pgsql_coro_onWrite(swReactor *reactor, swEvent *event)
  break;
  case PGRES_POLLING_FAILED:
  errMsg = PQerrorMessage(pg_object->conn);
  - php_printf("error:%s",errMsg);
  + swWarn("error:[%s]",errMsg);
  break;
  default:
  break;
  @@ -471,7 +471,7 @@ static PHP_METHOD(swoole_postgresql_coro, query)
  if(ret == 0)
  {
  char * errMsg = PQerrorMessage(pgsql);
  - php_printf("error:%s",errMsg);
  + swWarn("error:[%s]",errMsg);
  }
  @@ -716,7 +716,7 @@ static PHP_METHOD(swoole_postgresql_coro,metaData)
  if(ret == 0)
  {
  char * errMsg = PQerrorMessage(pgsql);
  - php_printf("error:%s",errMsg);
  + swWarn("error:[%s]",errMsg);
  }
  smart_str_free(&querystr);
  