loongson/pypi: links for pycocotools

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

loongson/pypi pycocotools-2.0.6.tar.gz
loongson/pypi pycocotools-2.0.6-cp37-cp37m-linux_loongarch64.whl
loongson/pypi pycocotools-2.0.6-cp36-cp36m-linux_loongarch64.whl