loongson/pypi: links for python-package-demo

loongson/mirror python_package_demo-0.3.tar.gz
loongson/mirror Python_Package_Demo-0.3-py3-none-any.whl
loongson/mirror Python_Package_Demo-0.2.tar.gz
loongson/mirror Python_Package_Demo-0.2-py3-none-any.whl
loongson/mirror Python_Package_Demo-0.1.tar.gz
loongson/mirror Python_Package_Demo-0.1-py3-none-any.whl