Add USE_MKLDNN_CBLAS build option. (#19014)
Summary:
MKL-DNN is the main library for computation when we use ideep device. It can use kernels implemented by different algorithms (including JIT, CBLAS, etc.) for computation. We add the "USE_MKLDNN_CBLAS" (default OFF) build option so that users can decide whether to use CBLAS computation methods or not.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19014
Differential Revision: D16094090
Pulled By: ezyang
fbshipit-source-id: 3f0b1d1a59a327ea0d1456e2752f2edd78d96ccc