Update default C++ standard to C++14

(3RDPARTY_UPDATE)

Resolves: COMPMID-3849

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: I6369f112337310140e2d6c8e79630cd11138dfa0
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4544
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/runtime/CL/functions/CLStackLayer.cpp b/src/runtime/CL/functions/CLStackLayer.cpp
index f4aa78a..3ef6a27 100644
--- a/src/runtime/CL/functions/CLStackLayer.cpp
+++ b/src/runtime/CL/functions/CLStackLayer.cpp
@@ -33,7 +33,6 @@
 #include "arm_compute/core/utils/misc/ShapeCalculator.h"
 #include "arm_compute/runtime/CL/CLScheduler.h"
 #include "src/core/CL/kernels/CLStackLayerKernel.h"
-#include "support/MemorySupport.h"
 
 namespace arm_compute
 {
@@ -61,7 +60,7 @@
 
     for(unsigned int i = 0; i < _num_inputs; i++)
     {
-        _stack_kernels.emplace_back(support::cpp14::make_unique<CLStackLayerKernel>());
+        _stack_kernels.emplace_back(std::make_unique<CLStackLayerKernel>());
         _stack_kernels.back()->configure(compile_context, input[i], axis_u, i, _num_inputs, output);
     }
 }