OpenCV for Tegra compilation fix for

- Gaussian blur;
- CascadeClassifier;
- Blenders in stitching module;
- Laplacial pyromids in stitching module.

modules/objdetect/src/cascadedetect.hpp

@@ -1,5 +1,7 @@
 #pragma once
 
+#include "opencv2/core/ocl.hpp"
+
 namespace cv
 {