loongson/pypi: links for flatlib

loongson/mirror flatlib-0.2.3.tar.gz
loongson/mirror flatlib-0.2.3-py3-none-any.whl
loongson/mirror flatlib-0.2.1.tar.gz
loongson/mirror flatlib-0.2.0.tar.gz
loongson/mirror flatlib-0.1.1.tar.gz
loongson/mirror flatlib-0.1.0.tar.gz