loongson/pypi: links for syncset

loongson/mirror syncset-2.0.0.tar.gz
loongson/mirror syncset-2.0.0-py3-none-any.whl
loongson/mirror syncset-1.2.3.tar.gz
loongson/mirror syncset-1.2.2.tar.gz
loongson/mirror syncset-1.2.1.tar.gz