loongson/pypi: links for pgdbpool

loongson/mirror pgdbpool-1.0.tar.gz
loongson/mirror pgdbpool-1.0rc2.tar.gz
loongson/mirror pgdbpool-1.0rc1.tar.gz
loongson/mirror pgdbpool-0.99.tar.gz
loongson/mirror pgdbpool-0.98rc1.tar.gz
loongson/mirror pgdbpool-0.97rc1.tar.gz