building on yocto w/o inference engine

[zach-welch-aquabyte]

When building for a system without Intel Inference Engine support, the standard Yocto Go build process attempts to build these modules and fails when it cannot find the required inference_engine.hpp header file. This failure can be worked around by deleting the openvino directory, but I suspect there might be a cleaner way to handle that. I am currently using gocv-0.23.0, so maybe this has been fixed in a newer version?