loongson/mirror: links for pypihub

loongson/mirror pypihub-0.21.tar.gz
loongson/mirror pypihub-0.21-py3-none-any.whl
loongson/mirror pypihub-0.18.tar.gz
loongson/mirror pypihub-0.18-py3-none-any.whl
loongson/mirror pypihub-0.16.tar.gz
loongson/mirror pypihub-0.16-py3-none-any.whl