loongson/pypi: links for imgstamptools

loongson/mirror imgStampTools-2.0.0.tar.gz
loongson/mirror imgStampTools-1.0.tar.gz
loongson/mirror imgStampTools-1.0-py3.7.egg
loongson/mirror imgStampTools-1.0-py3-none-any.whl
loongson/mirror imgStampTools-0.1.tar.gz