COMPMID-417 NEON/CL MeanStdDev bugfix using FillBorderKernel

Change-Id: Ic48ba7f69783d0e1e80611264e2bc67d1732436e
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/81293
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
diff --git a/arm_compute/core/CL/kernels/CLMeanStdDevKernel.h b/arm_compute/core/CL/kernels/CLMeanStdDevKernel.h
index 9f30f76..2c09590 100644
--- a/arm_compute/core/CL/kernels/CLMeanStdDevKernel.h
+++ b/arm_compute/core/CL/kernels/CLMeanStdDevKernel.h
@@ -63,12 +63,15 @@
     // Inherited methods overridden:
     void run(const Window &window, cl::CommandQueue &queue) override;
 
+    BorderSize border_size() const override;
+
 private:
     const ICLImage *_input;
     float          *_mean;
     float          *_stddev;
     cl::Buffer     *_global_sum;
     cl::Buffer     *_global_sum_squared;
+    BorderSize      _border_size;
 };
 }
 #endif /* __ARM_COMPUTE_CLMEANSTDDEVKERNEL_H__ */