Un-hardcode epsilon constant in FoldConvBatchNorm2d.
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/26584
Test Plan: Imported from OSS
Differential Revision: D17514653
Pulled By: ZolotukhinM
fbshipit-source-id: 7d9cc8f619b7dbe26fa58eac37cc131929c004d4
Author
Mikhail Zolotukhin
