Update scoring script for MoE paper
Update scoring script for MoE paper

Summary: Pull Request resolved: https://github.com/pytorch/fairseq/pull/586

Differential Revision: D14517550

Pulled By: myleott

fbshipit-source-id: fab68a8f597a98cf28d812d89eff845c5776b65b

pytorch/fairseq,pytorch/fairseq,pytorch/fairseq