loongson/pypi: links for pkmap

loongson/mirror pkmap-0.2.1.tar.gz
loongson/mirror pkmap-0.2.1-py3-none-any.whl
loongson/mirror pkmap-0.2.0.tar.gz
loongson/mirror pkmap-0.2.0-py3.8.egg
loongson/mirror pkmap-0.2.0-py3-none-any.whl