loongson/mirror: links for estnltk-light

loongson/mirror estnltk_light-1.6.7.7b0-py3-none-any.whl
loongson/mirror estnltk_light-1.6.7.6b0-py3-none-any.whl
loongson/mirror estnltk_light-1.6.7.5b0.tar.gz
loongson/mirror estnltk_light-1.6.7.5b0-py3-none-any.whl