loongson/pypi: links for attr

loongson/mirror attr-0.3.2.tar.gz
loongson/mirror attr-0.3.2-py2.py3-none-any.whl
loongson/mirror attr-0.3.1.tar.gz
loongson/mirror attr-0.3.1-py2-none-any.whl
loongson/mirror attr-0.3.0.tar.gz
loongson/mirror attr-0.3.0-py2-none-any.whl
loongson/mirror attr-0.2.0.tar.gz
loongson/mirror attr-0.1.0.tar.gz