Enable relu fusion with prepacked linear/conv. (#35705)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/35705
Introduces a pass for relu fusion.
Test Plan:
python test/test_xnnpack_integration.py
Imported from OSS
Differential Revision: D20746592
fbshipit-source-id: 6c22f60a20e9121618c85077b9b58fb8d4082b3b
