ubuntu16.04安装opencv2.4.9失败一次后成功
按照网上教程http://blog.csdn.net/w371500241/article/details/53449815安装后，运行sample里的facedetect程序时，出错，OpenCVError: Unspecified error (The function is notimplemented. Rebuild thelibrary with Windows, GTK+ 2.x
