Add gpu and cpu instances in scale-config.yaml (#1118)
Summary:
Fix a bug in the scale config file.
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1118
Reviewed By: atalman
Differential Revision: D38763875
Pulled By: xuzhao9
fbshipit-source-id: d982290e733cca6cd67628facf32636ac4ab2ee5
