loongson/pypi: links for plugsy

loongson/mirror PlugSy-0.2.31.tar.gz
loongson/mirror PlugSy-0.2.31-py3-none-any.whl
loongson/mirror PlugSy-0.2.30.tar.gz
loongson/mirror PlugSy-0.2.30-py3-none-any.whl