Fix endpoibnt definition in setupscript
Static variable is changed to macro definition.
/*
* MQTT Broker endpoint.
*/
-static const char clientcredentialMQTT_BROKER_ENDPOINT[] = <IOTEndpoint>;
+#define clientcredentialMQTT_BROKER_ENDPOINT <IOTEndpoint>
/* Use of a "define" and not a "static const" here to be able to
