loongson/pypi: links for mxrain

loongson/mirror mxrain-0.1.3.win-amd64.zip
loongson/mirror mxrain-0.1.3-py3-none-any.whl
loongson/mirror mxrain-0.1.2.win-amd64.zip
loongson/mirror mxrain-0.1.1.tar.gz