Add filter example to the pytest-benchmark driver section (#1632)
Summary:
The`run.py` doesn't have `-k` flag. The filter example was originally created for the `pytest-benchmark driver`, where it works as expected. It seems like at one point the `run.py` section was added mistakenly before (instead of after) the filter example.
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1632
Reviewed By: aaronenyeshi
Differential Revision: D45734602
Pulled By: xuzhao9
fbshipit-source-id: 3d8458f1ab6872e9621b36adbeb36d99709c2a68