* WIP PM and callback for vanilla RNN

* - Graph pass to fuse vanilla RNN Cell
- Unit test case for vanilla rnn through TF serialized graph

* - emit MKLDNN kernel for vanilla RNN ii) test case for Vanilla for cpu v/s inter

* i) style check ii) serialized graph for tf vanilla rnn

* fix warnings

* i) fixed emitter code ii) test case passes

* - added support for Vanilla RNN for MKLDNN > v1.0

* fix compiler warnings

* Fix build error

* fix unit test case
Co-authored-by: Robert Kimball <robert.kimball@intel.com>
Co-authored-by: Scott Cyphers <diyessi@users.noreply.github.com>