[feature request] add example code for ideep on the pytorch_dnnl{,_dev} branch

[cdluminate]

I'd like to request for a simple .cc example file using ideep on the pytorch_dnnl{,_dev} branch.

Developers of some distributions, say Debian, won't include the sources from git submodules when doing the packaging. In that sense, these developers will need a way of sanity testing to ensure that the packaged ideep indeed works with the separately packaged onednn.

Thank you very much :-)