Minor fix of the nvidia driver install (#1740)
Summary: Pull Request resolved: https://github.com/pytorch/benchmark/pull/1740
Reviewed By: aaronenyeshi
Differential Revision: D46883990
Pulled By: xuzhao9
fbshipit-source-id: d6904f90d8d1434b0dbd2b8c95ad5973ff86f3a2
