loongson/pypi: links for opencv-python

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

loongson/pypi opencv_python-4.10.0.84-cp39-cp39-linux_loongarch64.whl
loongson/pypi opencv_python-4.10.0.84-cp310-cp310-linux_loongarch64.whl
loongson/pypi opencv_python-4.8.1.78-cp37-cp37m-linux_loongarch64.whl
loongson/pypi opencv_python-4.7.0.72-cp38-cp38-linux_loongarch64.whl
loongson/pypi opencv-python-4.6.0.66.tar.gz
loongson/pypi opencv_python-4.6.0.66-cp38-cp38-linux_loongarch64.whl
loongson/pypi opencv_python-4.6.0.66-cp37-cp37m-linux_loongarch64.whl
loongson/pypi opencv_python-4.6.0.66-cp36-cp36m-linux_loongarch64.whl
loongson/pypi opencv_python-4.5.3.56-cp37-cp37m-linux_loongarch64.whl
loongson/pypi opencv_python-4.5.1.48-cp37-cp37m-linux_loongarch64.whl
loongson/pypi opencv_python-4.4.0.46-cp37-cp37m-linux_loongarch64.whl