### Describe Your Changes
Added makefile rule for `GOARCH=loong64` to support building all
VictoriaMetrics components on the `loongarch64` platform.
### Checklist
The following checks are **mandatory**:
* [X] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).
Signed-off-by: qiangxuhui <qiangxuhui@loongson.cn>
(cherry picked from commit 80f3644ee3)
Signed-off-by: hagen1778 <roman@victoriametrics.com>