loongson/pypi: links for selflayer

loongson/mirror selflayer-0.2.1.tar.gz
loongson/mirror selflayer-0.2.1-py3-none-any.whl
loongson/mirror selflayer-0.2.0.tar.gz
loongson/mirror selflayer-0.2.0-py3-none-any.whl