loongson/pypi: links for dask-ec2

loongson/mirror dask-ec2-0.5.0.tar.gz
loongson/mirror dask-ec2-0.4.0.tar.gz
loongson/mirror dask_ec2-0.4.0-py2.py3-none-any.whl
loongson/mirror dask-ec2-0.3.1.tar.gz
loongson/mirror dask-ec2-0.3.0.tar.gz