loongson/pypi: links for rax-instance-backup-python-novaclient-ext

loongson/mirror rax_instance_backup_python_novaclient_ext-0.1.2.tar.gz
loongson/mirror rax_instance_backup_python_novaclient_ext-0.1.1.tar.gz
loongson/mirror rax_instance_backup_python_novaclient_ext-0.1.0.tar.gz