报错：consider to specify kernel configuration cache directory
via OPENCV_OCL4DNN_CONFIG_PATH parameter.
把OPENCL换成CPU就可以，不知道为什么。
灵感来源：https://blog.csdn.net/hnsdgxylh/article/details/101904843?utm_medium=distribute.pc_relevant_ask_down.none-task-blog-baidujs-1.nonecase&depth_1-utm_source=distribute.pc_relevant_ask_down.none-task-blog-baidujs-1.nonecase
