COMPMID-2080 Create a new kernel for CLPad with CONSTANT mode

Change-Id: Ib67bacd40c13c7784ca9f5699a235f9d106baddb
Signed-off-by: Giorgio Arena <giorgio.arena@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1739
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Giuseppe Rossini <giuseppe.rossini@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/core/CL/CLKernels.h b/arm_compute/core/CL/CLKernels.h
index cd9eadc..e002de7 100644
--- a/arm_compute/core/CL/CLKernels.h
+++ b/arm_compute/core/CL/CLKernels.h
@@ -121,6 +121,7 @@
 #include "arm_compute/core/CL/kernels/CLNonMaximaSuppression3x3Kernel.h"
 #include "arm_compute/core/CL/kernels/CLNormalizationLayerKernel.h"
 #include "arm_compute/core/CL/kernels/CLNormalizePlanarYUVLayerKernel.h"
+#include "arm_compute/core/CL/kernels/CLPadLayerKernel.h"
 #include "arm_compute/core/CL/kernels/CLPermuteKernel.h"
 #include "arm_compute/core/CL/kernels/CLPixelWiseMultiplicationKernel.h"
 #include "arm_compute/core/CL/kernels/CLPoolingLayerKernel.h"