loongson/mirror: links for open-plus

loongson/mirror open_plus-0.2-py3-none-any.whl
loongson/mirror open_plus-0.1.2-py3-none-any.whl
loongson/mirror open_plus-0.1.1-py3-none-any.whl
loongson/mirror open_plus-0.1-py3-none-any.whl