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/examples/graph_srcnn955.cpp b/examples/graph_srcnn955.cpp
index a95f0c1..bcc3824 100644
--- a/examples/graph_srcnn955.cpp
+++ b/examples/graph_srcnn955.cpp
@@ -78,7 +78,7 @@
         const std::string model_path = "/cnn_data/srcnn955_model/";
 
         // Create a preprocessor object
-        std::unique_ptr<IPreprocessor> preprocessor = arm_compute::support::cpp14::make_unique<TFPreproccessor>();
+        std::unique_ptr<IPreprocessor> preprocessor = std::make_unique<TFPreproccessor>();
 
         // Create input descriptor
         const TensorShape tensor_shape     = permute_shape(TensorShape(image_width, image_height, 3U, 1U), DataLayout::NCHW, common_params.data_layout);
@@ -111,7 +111,7 @@
                   PadStrideInfo(1, 1, 2, 2))
               .set_name("conv3/convolution")
               << ActivationLayer(ActivationLayerInfo(ActivationLayerInfo::ActivationFunction::RELU)).set_name("conv3/Relu")
-              << OutputLayer(arm_compute::support::cpp14::make_unique<DummyAccessor>(0));
+              << OutputLayer(std::make_unique<DummyAccessor>(0));
 
         // Finalize graph
         GraphConfig config;