loongson/pypi: links for pypinex-less

loongson/mirror pypinex_less-0.2021.3.20.tar.gz
loongson/mirror pypinex_less-0.2021.3.17.1.tar.gz
loongson/mirror pypinex_less-0.2021.3.17.tar.gz
loongson/mirror pypinex_less-0.2021.3.16.tar.gz