correct measure quantization error when followed_by=Relu and dequantize_output=1 (#21664)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21664
As title
Reviewed By: csummersea
Differential Revision: D15770947
fbshipit-source-id: 57f5842e1a250300703b02134c314e4f06b767b8
