loongson/pypi: links for butty

loongson/mirror butty-1.0.0.tar.gz
loongson/mirror butty-1.0.0-py3-none-any.whl
loongson/mirror butty-0.1.0.dev4.tar.gz
loongson/mirror butty-0.1.0.dev4-py3-none-any.whl