COMPMID-417: Extract common toolchain support file

The support file is needed as Android toolchains are missing some C++11
functions. It further includes functions that have been introduced in
C++14 but which we already need.

Eventually the support file might become unnecessary if the Android
compilers improve and we switch to C++14.

Change-Id: Ib5ec506f1a17c78149c315ab2096b901b852c180
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/79247
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
diff --git a/src/runtime/CL/functions/CLPoolingLayer.cpp b/src/runtime/CL/functions/CLPoolingLayer.cpp
index 1ef70f4..2cb7d63 100644
--- a/src/runtime/CL/functions/CLPoolingLayer.cpp
+++ b/src/runtime/CL/functions/CLPoolingLayer.cpp
@@ -24,14 +24,14 @@
 #include "arm_compute/runtime/CL/functions/CLPoolingLayer.h"
 
 #include "arm_compute/core/CL/kernels/CLPoolingLayerKernel.h"
-#include "arm_compute/core/Helpers.h"
+#include "support/ToolchainSupport.h"
 
 using namespace arm_compute;
 
 void CLPoolingLayer::configure(ICLTensor *input, ICLTensor *output, const PoolingLayerInfo &pool_info)
 {
     // Configure pooling kernel
-    auto k = arm_compute::cpp14::make_unique<CLPoolingLayerKernel>();
+    auto k = arm_compute::support::cpp14::make_unique<CLPoolingLayerKernel>();
     k->configure(input, output, pool_info);
     _kernel = std::move(k);