loongson/mirror: links for extratree

loongson/mirror ExtraTree-0.0.3.tar.gz
loongson/mirror ExtraTree-0.0.3-py3-none-any.whl
loongson/mirror ExtraTree-0.0.1.tar.gz
loongson/mirror ExtraTree-0.0.1-py3-none-any.whl