loongson/pypi: links for libplf

loongson/mirror libplf-0.0.4.tar.gz
loongson/mirror libplf-0.0.4-py3-none-any.whl
loongson/mirror libplf-0.0.3.tar.gz
loongson/mirror libplf-0.0.3-py3.8.egg
loongson/mirror libplf-0.0.3-py3-none-any.whl