loongson/mirror: links for mean-package

loongson/mirror mean-package-0.0.1.1.tar.gz
loongson/mirror mean_package-0.0.1.1-py3-none-any.whl
loongson/mirror mean-package-0.0.1.tar.gz
loongson/mirror mean_package-0.0.1-py3-none-any.whl