loongson/pypi: links for discounts

loongson/mirror discounts-0.0.8.tar.gz
loongson/mirror discounts-0.0.7.tar.gz
loongson/mirror discounts-0.0.6.tar.gz
loongson/mirror discounts-0.0.5.tar.gz
loongson/mirror discounts-0.0.4.tar.gz