Remove the use of distro.linux_distribution() (#701)
Summary:
distro.linux_distribution() is now deprecated and should be replaced with distro.name().
Pull Request resolved: https://github.com/pytorch/benchmark/pull/701
Reviewed By: erichan1
Differential Revision: D33668006
Pulled By: xuzhao9
fbshipit-source-id: ef2673292fb65ae67e93e50f4c3cddb999bc9976
