loongson/pypi: links for pointgrid

loongson/mirror pointgrid-0.0.5.tar.gz
loongson/mirror pointgrid-0.0.5-py3.7.egg
loongson/mirror pointgrid-0.0.4.tar.gz
loongson/mirror pointgrid-0.0.3.tar.gz
loongson/mirror pointgrid-0.0.2.tar.gz
loongson/mirror pointgrid-0.0.1.tar.gz