* Use mkl-dnn v1.0 or v0.x depending on compilation flag.

* Change cpu builder files.

* Modify cmake files.

Use mkldnn-v1.0 for DEX if NGRAPH_USE_MKLDNN_V1 is set to true, otherwise use mkldnn-v0.x.

CODEGEN only builds with mkldnn-v1.0.

* Implement mkldnn utility functions for mkldnn-v1.0.

User mode scratchpad management for mkldnn-v1.0.

* Query scratchpad size and allocate a buffer of max scratchpad size.

* Do not create mkldnn::memory when query scratchpad size of Reorder.

Modify mkldnn utility functions.

Fix convolution_forward_init and inner_product_forward_init.

Modify CPURuntimeContextCG.

* Add user mode scratchpad to CODEGEN.

* mkldnn-v1.0 splits LSTM states. Update Rnn/Lstm Op accordingly.

* Address PR feedback: use MKLDNN_MAJOR_VERSION.

* Modify cpu rnn fusion pass and related unit tests.

* Change Rnn/Lstm arg types to Output.

* Fix Lstm for CODEGEN.

* Set native layout for Slice when input format is blocked.

* Do not print scratchpad size.

* Change external_mkldnn_v1.cmake.

Fix a typo.

* Add mkldnn_v1.patch for mkldnn-v1.0.

* Address PR feedback.

* Define MKLDNN_ERROR_MESSAGE.

* Address PR feedback: change to NGRAPH_USE_LEGACY_MKLDNN.

* Fix a bug.

* Remove unused variable.

* Fix compiler warnings.

* Fix a bug for CODEGEN.

* Move variable only needed for mkldnn-v0.20 inside #if.

* Remove unused variables.

* No in place Reshape rotation for blocked data layout with mkldnn-v1.0.

* Modify mkldnn_v1.patch to force mkldnn to link to libiomp.

* Fix style.

* Change path for find_library and find_file.

* Do not insert ConvertLayout before/after Quantize/DeQuantize for blocked data layout.

* Write strides information to visualized graph.

* Move variables only needed for mkldnn-v0 under #if.

* Move more variables in rnn fusion.

* Fix ConvertLayout constant folding for mkldnn-v1.0.