loongson/mirror: links for potnanny-core

loongson/mirror potnanny-core-0.2.8.tar.gz
loongson/mirror potnanny_core-0.2.8-py3-none-any.whl
loongson/mirror potnanny-core-0.2.7.tar.gz
loongson/mirror potnanny_core-0.2.7-py3-none-any.whl