loongson/pypi: links for empty

loongson/mirror Empty-0.4.4.tar.gz
loongson/mirror Empty-0.4.3.tar.gz
loongson/mirror Empty-0.4.2.tar.gz
loongson/mirror Empty-0.4.1.tar.gz
loongson/mirror Empty-0.4.tar.gz
loongson/mirror Empty-0.3.3.tar.gz
loongson/mirror empty-0.3.2.tar.gz
loongson/mirror Empty-0.3.tar.gz