loongson/pypi: links for pip-upgrade-all

loongson/mirror pip_upgrade_all-0.1.6.tar.gz
loongson/mirror pip_upgrade_all-0.1.6-py3-none-any.whl
loongson/mirror pip_upgrade_all-0.1.5.tar.gz
loongson/mirror pip_upgrade_all-0.1.5-py3-none-any.whl
loongson/mirror pip_upgrade_all-0.1.4.tar.gz
loongson/mirror pip_upgrade_all-0.1.4-py3-none-any.whl