loongson/pypi: links for reladb

loongson/mirror RelaDB-2.0.1.tar.gz
loongson/mirror RelaDB-2.0.1-py3-none-any.whl
loongson/mirror RelaDB-2.0.0.tar.gz
loongson/mirror RelaDB-2.0.0-py3-none-any.whl