loongson/pypi: links for tracbacklog

loongson/mirror TracBacklog-0.5.1.dev1.tar.gz
loongson/mirror TracBacklog-0.5.1.dev1-py2-none-any.whl
loongson/mirror TracBacklog-0.3.1.tar.gz
loongson/mirror TracBacklog-0.3.0.tar.gz