message: Add ONNXIFI_BACKEND_PROPERTY_LOG_LEVEL backend initialization property
  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.
diff: @@ -476,25 +476,68 @@ typedef int32_t onnxBackendInfo;
  * ONNXIFI_OPTIMIZATION_LOW_DELAY
  */
  #define ONNXIFI_BACKEND_PROPERTY_OPTIMIZATION 1
  +/**
  + * Logging verbosity level for the backend.
  + *
  + * If this property is not specified during initialization, the backend should
  + * assume ONNXIFI_LOG_LEVEL_WARNING logging verbosity level.
  + *
  + * Possible values:
  + * ONNXIFI_LOG_LEVEL_ERROR
  + * ONNXIFI_LOG_LEVEL_WARNING
  + * ONNXIFI_LOG_LEVEL_INFO
  + * ONNXIFI_LOG_LEVEL_DEBUG
  + */
  +#define ONNXIFI_BACKEND_PROPERTY_LOG_LEVEL 2
  /**
  * Optimize graph representation and compilation for highest throughput.
  */
  #define ONNXIFI_OPTIMIZATION_HIGH_THROUGHPUT 0
  +
  /**
  * Optimize graph representation and compilation for lowest latency.
  */
  #define ONNXIFI_OPTIMIZATION_LOW_LATENCY 1
  +
  /**
  * Optimize graph representation and compilation for lowest power consumption.
  */
  #define ONNXIFI_OPTIMIZATION_LOW_POWER 2
  +
  /**
  * Optimize graph representation and compilation for lowest delay until first
  * result.
  */
  #define ONNXIFI_OPTIMIZATION_LOW_DELAY 3
  +/**
  + * Log events which caused a failure in an ONNXIFI function call.
  + */
  +#define ONNXIFI_LOG_LEVEL_ERROR 4
  +
  +/**
  + * Log events in ONNXIFI_LOG_LEVEL_ERROR and events which caused
  + * a performance, accuracy, or quality of service degradation in a backend.
  + * Enabling this logging level SHOULD NOT have a measurable effect on
  + * performance.
  + */
  +#define ONNXIFI_LOG_LEVEL_WARNING 3
  +
  +/**
  + * Log events in ONNXIFI_LOG_LEVEL_WARNING and high-level status information
  + * about operation of a backend. Enabling this logging level MAY cause a small
  + * degradation in performance.
  + */
  +#define ONNXIFI_LOG_LEVEL_INFO 2
  +
  +/**
  + * Log events in ONNXIFI_LOG_LEVEL_INFO and detailed status information about
  + * operations of a backend. Enabling this logging level MAY cause a serious
  + * degradation in performance.
  + */
  +#define ONNXIFI_LOG_LEVEL_DEBUG 1
  +
  typedef struct onnxTensorDescriptor {
  /**
  * Name of the blob corresponding to this tensor in the ONNX model. The name
  