loongson/pypi: links for customsignxml

loongson/mirror customsignxml-3.3.3.tar.gz
loongson/mirror customsignxml-3.3.3-py3-none-any.whl
loongson/mirror customsignxml-3.2.3.tar.gz
loongson/mirror customsignxml-3.2.3-py3-none-any.whl