Add ONNXIFI_BACKEND_PROPERTY_LOG_LEVEL backend initialization property (#1225)
Add ONNXIFI_BACKEND_PROPERTY_LOG_LEVEL backend initialization property (#1225)

Most deep learning frameworks and higher-level software let users specify verbosity level. The new ONNXIFI_BACKEND_PROPERTY_LOG_LEVEL property lets a deep learning framework convey this information to an ONNXIFI backend.
onnx/onnx,onnx/onnx,onnx/onnx,onnx/onnx