loongson/pypi: links for setuptools

INFO: Because this project isn't in the mirror_whitelist, no releases from root/pypi are included.

loongson/pypi setuptools-65.3.0-py3-none-any.whl
loongson/pypi setuptools-59.2.0.zip
loongson/pypi setuptools-59.2.0-py3-none-any.whl
loongson/pypi setuptools-40.6.3-py2.py3-none-any.whl