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/PoolManager.cpp b/src/runtime/PoolManager.cpp
index 19ed257..87376a7 100644
--- a/src/runtime/PoolManager.cpp
+++ b/src/runtime/PoolManager.cpp
@@ -25,7 +25,6 @@
 
 #include "arm_compute/core/Error.h"
 #include "arm_compute/runtime/IMemoryPool.h"
-#include "support/MemorySupport.h"
 
 #include <algorithm>
 #include <list>
@@ -71,7 +70,7 @@
     _free_pools.push_front(std::move(pool));
 
     // Update semaphore
-    _sem = arm_compute::support::cpp14::make_unique<arm_compute::Semaphore>(_free_pools.size());
+    _sem = std::make_unique<arm_compute::Semaphore>(_free_pools.size());
 }
 
 std::unique_ptr<IMemoryPool> PoolManager::release_pool()
@@ -86,7 +85,7 @@
         _free_pools.pop_front();
 
         // Update semaphore
-        _sem = arm_compute::support::cpp14::make_unique<arm_compute::Semaphore>(_free_pools.size());
+        _sem = std::make_unique<arm_compute::Semaphore>(_free_pools.size());
 
         return pool;
     }