loongson/pypi: links for pagexml-to-mask-converter

loongson/mirror PageXML_to_Mask_converter-0.2.tar.gz
loongson/mirror PageXML_to_Mask_converter-0.2-py3-none-any.whl
loongson/mirror PageXML_to_Mask_converter-0.1.tar.gz
loongson/mirror PageXML_to_Mask_converter-0.1-py3-none-any.whl