loongson/pypi: links for products-purgemissingobjectinterfaces

loongson/mirror Products.PurgeMissingObjectInterfaces-1.0.4a.tar.gz
loongson/mirror Products.PurgeMissingObjectInterfaces-1.0.3a.tar.gz
loongson/mirror Products.PurgeMissingObjectInterfaces-1.0.2a.tar.gz
loongson/mirror Products.PurgeMissingObjectInterfaces-1.0.1a.tar.gz
loongson/mirror Products.PurgeMissingObjectInterfaces-1.0a.tar.gz