loongson/pypi: links for findpg

loongson/mirror findpg-3.0.tar.gz
loongson/mirror findpg-2.3.post1.tar.gz
loongson/mirror findpg-2.3.tar.gz
loongson/mirror findpg-2.2.post1.tar.gz
loongson/mirror findpg-2.1.tar.gz
loongson/mirror findpg-2.0.tar.gz
loongson/mirror findpg-1.0.tar.gz