pytorch

107c9ef5 - Add back c2 string_utils include header to benchmark_helper

Add back c2 string_utils include header to benchmark_helper Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/15143 Differential Revision: D13439694 fbshipit-source-id: 78698b66d52a0178118cbf3e79a7a5ad1763d47b