loongson/pypi: links for platron

loongson/mirror platron-3.1.0.tar.gz
loongson/mirror platron-3.0.0.tar.gz
loongson/mirror platron-2.4.0.tar.gz
loongson/mirror platron-2.2.0.tar.gz
loongson/mirror platron-2.0.2.tar.gz
loongson/mirror platron-2.0.1.tar.gz
loongson/mirror platron-2.0.0.tar.gz
loongson/mirror platron-2.0.0-py3.8.egg
loongson/mirror platron-1.0.0.tar.gz