benchmark

eb672435 - Pin the version of dill for attention_is_all_you_need_pytorch (#922)

Pin the version of dill for attention_is_all_you_need_pytorch (#922) Summary: `attention_is_all_you_need_pytorch` requires dill == 0.3.4, newer dill version will have the following error: ``` ModuleNotFoundError: No module named 'dill._shims' ``` Fix another API change of `prepare_qat_fx` API (https://github.com/pytorch/pytorch/pull/77608) Pull Request resolved: https://github.com/pytorch/benchmark/pull/922 Reviewed By: erichan1 Differential Revision: D36600030 Pulled By: xuzhao9 fbshipit-source-id: 8877476cc1d16f23c63af79016e44f6c5b69772e