loongson/pypi: links for products-ecassignmentbox

loongson/mirror Products.ECAssignmentBox-1.5.1.tar.gz
loongson/mirror Products.ECAssignmentBox-1.5.tar.gz
loongson/mirror Products.ECAssignmentBox-1.4.2.tar.gz
loongson/mirror Products.ECAssignmentBox-1.4.1.tar.gz