added gpu::printCudaDeviceInfo to all samples

samples/gpu/multi.cpp

@@ -46,6 +46,8 @@ int main()
     }
     for (int i = 0; i < num_devices; ++i)
     {
+        cv::gpu::printShortCudaDeviceInfo(i);
+
         DeviceInfo dev_info(i);
         if (!dev_info.isCompatible())
         {