loongson/pypi: links for downdoc

loongson/mirror downdoc-1.2.0.tar.gz
loongson/mirror downdoc-1.1.2.tar.gz
loongson/mirror downdoc-1.1.1.tar.gz
loongson/mirror downdoc-1.1.0.tar.gz
loongson/mirror downdoc-1.0.2.tar.gz
loongson/mirror downdoc-1.0.1.tar.gz
loongson/mirror downdoc-1.0.0.tar.gz