add benchmark for quantized batchnorm (#35389)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/35389
Adds a benchmark for quantized batchnorm, with the parameters
the same compared to floating point batchnorm benchmark.
Test Plan:
run benchmarks
https://gist.github.com/vkuzo/c49be58abdf0ff64797fab3936d0cb15
Imported from OSS
Differential Revision: D20875543
fbshipit-source-id: ced89fbe2d18168e92950d0b74ca638aba54cd96
