loongson/pypi: links for stacked-generalization

loongson/mirror stacked_generalization-0.0.6-py3-none-any.whl
loongson/mirror stacked_generalization-0.0.5-py3-none-any.whl
loongson/mirror stacked_generalization-0.0.4.zip
loongson/mirror stacked_generalization-0.0.3.zip