loongson/mirror: links for i-pi

loongson/mirror i-PI-2.4.1.tar.gz
loongson/mirror i_PI-2.4.1-py2-none-any.whl
loongson/mirror i-PI-2.4.0.tar.gz
loongson/mirror i_PI-2.4.0-py3-none-any.whl
loongson/mirror i_PI-2.4.0-py2-none-any.whl