loongson/mirror: links for privex-exchange

loongson/mirror privex_exchange-0.2.0.tar.gz
loongson/mirror privex_exchange-0.2.0-py3-none-any.whl
loongson/mirror privex_exchange-0.1.0.tar.gz
loongson/mirror privex_exchange-0.1.0-py3-none-any.whl