message: Added initialization of numThreads from iOS
diff: - (void)copyToCOptions:(TfLiteBaseOptions *)cBaseOptions {
  if (self.modelFile.filePath) {
  cBaseOptions->model_file.file_path = self.modelFile.filePath.UTF8String;
  + cBaseOptions->computeSettings.cpuSettings.num_threads = (int)self.computeSettings.cpuSettings.numThreads;
  }
  }
  