loongson/pypi: links for ply

loongson/pypi ply-3.11.tar.gz
loongson/pypi ply-3.11-py2.py3-none-any.whl
loongson/mirror ply-3.10.tar.gz
loongson/mirror ply-3.9.tar.gz
loongson/mirror ply-3.8.tar.gz
loongson/mirror ply-3.6.tar.gz
loongson/mirror ply-3.4.tar.gz