loongson/pypi: links for preload

loongson/mirror preload-2.2.tar.gz
loongson/mirror preload-2.2-py3-none-any.whl
loongson/mirror preload-2.1.tar.gz
loongson/mirror preload-2.1-py3-none-any.whl
loongson/mirror preload-2.0-py3-none-any.whl
loongson/mirror preload-1.1.tar.gz
loongson/mirror preload-1.1-py3-none-any.whl