loongson/pypi: links for flack

loongson/mirror flack-1.3.7.tar.gz
loongson/mirror flack-1.3.6.tar.gz
loongson/mirror flack-1.3.5.tar.gz
loongson/mirror flack-1.3.4.tar.gz
loongson/mirror flack-1.2.2.tar.gz
loongson/mirror flack-1.2.1.tar.gz
loongson/mirror flack-1.2.0.tar.gz