loongson/pypi: links for datadb

loongson/mirror datadb-0.0.6.tar.gz
loongson/mirror datadb-0.0.5.tar.gz
loongson/mirror datadb-0.0.4.tar.gz
loongson/mirror datadb-0.0.2.tar.gz
loongson/mirror datadb-0.0.1.tar.gz