arm_compute v18.02

Change-Id: I7207aa488e5470f235f39b6c188b4678dc38d1a6
diff --git a/src/runtime/CPP/CPPScheduler.cpp b/src/runtime/CPP/CPPScheduler.cpp
index a83a0bc..4e4dd87 100644
--- a/src/runtime/CPP/CPPScheduler.cpp
+++ b/src/runtime/CPP/CPPScheduler.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2017 ARM Limited.
+ * Copyright (c) 2016-2018 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -156,7 +156,7 @@
 }
 
 CPPScheduler::CPPScheduler()
-    : _num_threads(std::thread::hardware_concurrency()),
+    : _num_threads(num_threads_hint()),
       _threads(_num_threads - 1)
 {
 }