loongson/mirror: links for flappy-bird-env

loongson/mirror flappy-bird-env-0.1.6.tar.gz
loongson/mirror flappy_bird_env-0.1.6-py3-none-any.whl
loongson/mirror flappy-bird-env-0.1.5.tar.gz
loongson/mirror flappy_bird_env-0.1.5-py3-none-any.whl
loongson/mirror flappy-bird-env-0.1.4.tar.gz
loongson/mirror flappy_bird_env-0.1.4-py3-none-any.whl