Check for errors.txt in the right dir and always run (#1563)
Summary:
Forgot the classic line of moving into benchmark to check for errors.txt, since everything else is also run in benchmark.
Also adds the "always" so that even if prior things fail, we can see if errors.txt had anything.
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1563
Reviewed By: xuzhao9
Differential Revision: D45189175
Pulled By: janeyx99
fbshipit-source-id: f131ee50353a54970316c079a0af3f3201f27f4e
