loongson/pypi: links for stringbuilder-py

loongson/mirror stringbuilder.py-2.0.1.tar.gz
loongson/mirror stringbuilder.py-2.0.0.tar.gz
loongson/mirror stringbuilder.py-1.0.1.tar.gz
loongson/mirror stringbuilder.py-1.0.0.tar.gz
loongson/mirror stringbuilder.py-0.0.0.tar.gz