Add lit-llama benchmarks (logits, autoregressive generation, lora fine tuning) (#1730)
Summary:
Signed-off-by: Edward Z. Yang <ezyang@meta.com>
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1730
Reviewed By: xuzhao9
Differential Revision: D47295535
Pulled By: ezyang
fbshipit-source-id: 9e5998569b6dc58c6c918c4caaf1e6c896600430