Suppress leaked semaphore warnings
Suppress leaked semaphore warnings

Summary: Pull Request resolved: https://github.com/fairinternal/fairseq-py/pull/844

Differential Revision: D16985131

Pulled By: myleott

fbshipit-source-id: 66ba3b9aa0cdf329a1e38fc09786f34906afdb43

pytorch/fairseq,pytorch/fairseq,pytorch/fairseq