Replace distutils strtobool in gen-summary-md (#703)
Summary:
Since we are deprecating distutils, remove this import from gen_summary_metadata.py
and add our own str_to_bool implementation.
Pull Request resolved: https://github.com/pytorch/benchmark/pull/703
Reviewed By: xuzhao9
Differential Revision: D33685893
Pulled By: aaronenyeshi
fbshipit-source-id: 82cb39a333db0ef6a0d5b9dd823f32728b10f977
