loongson/pypi: links for pyearthtools-tutorial

loongson/mirror pyearthtools_tutorial-0.5.1.tar.gz
loongson/mirror pyearthtools_tutorial-0.5.1-py3-none-any.whl
loongson/mirror pyearthtools_tutorial-0.5.0.tar.gz
loongson/mirror pyearthtools_tutorial-0.5.0-py3-none-any.whl