COMPMID-3639: (3RDPARTY_UPDATE) Move CL kernels to src

Change-Id: I10d27db788e5086adae1841e3e2441cd9b76ef84
Signed-off-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4310
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/runtime/CL/functions/CLFlattenLayer.cpp b/src/runtime/CL/functions/CLFlattenLayer.cpp
index a826541..0646a0d 100644
--- a/src/runtime/CL/functions/CLFlattenLayer.cpp
+++ b/src/runtime/CL/functions/CLFlattenLayer.cpp
@@ -23,8 +23,8 @@
  */
 #include "arm_compute/runtime/CL/functions/CLFlattenLayer.h"
 
-#include "arm_compute/core/CL/kernels/CLFlattenLayerKernel.h"
 #include "arm_compute/runtime/CL/CLScheduler.h"
+#include "src/core/CL/kernels/CLFlattenLayerKernel.h"
 #include "support/MemorySupport.h"
 
 using namespace arm_compute;