loongson/pypi: links for mathutils

loongson/mirror mathutils-3.3.0.tar.gz
loongson/mirror mathutils-2.81.2.tar.gz
loongson/mirror mathutils-2.79.2.tar.gz
loongson/mirror mathutils-2.79.1.tar.gz
loongson/mirror mathutils-2.79.tar.gz
loongson/mirror mathutils-2.78.tar.gz
loongson/mirror mathutils-2.77.tar.gz
loongson/mirror mathutils-2.76.tar.gz
loongson/mirror mathutils-2.74.1.tar.gz