loongson/pypi: links for psycopg2

INFO: Because this project isn't in the mirror_whitelist, no releases from root/pypi are included.

loongson/pypi psycopg2-2.9.9-cp310-cp310-linux_loongarch64.whl
loongson/pypi psycopg2-2.8.6.tar.gz
loongson/pypi psycopg2-2.8.6-cp27-cp27mu-linux_loongarch64.whl
loongson/pypi psycopg2-2.8.5-cp37-cp37m-linux_loongarch64.whl