loongson/pypi: links for mxbox

loongson/mirror mxbox-0.0.22-py2.py3-none-any.whl
loongson/mirror mxbox-0.0.21-py2.py3-none-any.whl
loongson/mirror mxbox-0.0.3-py2.py3-none-any.whl
loongson/mirror mxbox-0.0.1-py2.py3-none-any.whl