Print model and number of trained params
Print model and number of trained params

Summary: Pull Request resolved: https://github.com/pytorch/fairseq/pull/469

Differential Revision: D13802945

Pulled By: myleott

fbshipit-source-id: b6976506a8336b96ee40505c4a7638541cc99c95

pytorch/fairseq,pytorch/fairseq,pytorch/fairseq