COMPMID-1451 Fix YOLOv3 android compilation issue

Change-Id: Ie12d4451f7b85a0411bf5750e49a48631e38d90f
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/148041
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
Tested-by: Jenkins <bsgcomp@arm.com>
diff --git a/examples/graph_yolov3.cpp b/examples/graph_yolov3.cpp
index d2f7ae5..24186d5 100644
--- a/examples/graph_yolov3.cpp
+++ b/examples/graph_yolov3.cpp
@@ -218,7 +218,7 @@
                          unsigned int filter_size)
     {
         std::string total_path  = "/cnn_data/yolov3_model/";
-        std::string param_path2 = std::to_string(std::stoi(param_path) + 1);
+        std::string param_path2 = arm_compute::support::cpp11::to_string(arm_compute::support::cpp11::stoi(param_path) + 1);
         SubStream   i_a(graph);
         SubStream   i_b(graph);
         i_a << ConvolutionLayer(