loongson/pypi: links for backstage-oauth2

loongson/mirror backstage-oauth2-0.1.8.tar.gz
loongson/mirror backstage_oauth2-0.1.8-py2.py3-none-any.whl
loongson/mirror backstage-oauth2-0.1.7.tar.gz
loongson/mirror backstage_oauth2-0.1.7-py2.py3-none-any.whl
loongson/mirror backstage-oauth2-0.1.3.tar.gz
loongson/mirror backstage-oauth2-0.1.1.tar.gz
loongson/mirror backstage-oauth2-0.1.0.tar.gz