Debugger: Make qmlServer url again accessible in DebuggerRunTool

Currently needed by GammaRayIntegration.

Change-Id: I0915e4bf02bd9be3f1fe0342b9b9ce543811a9ca
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/debugger/debuggerruncontrol.h

@@ -116,6 +116,7 @@ public:
     void setDebugInfoLocation(const QString &debugInfoLocation);
 
     void setQmlServer(const QUrl &qmlServer);
+    QUrl qmlServer() const; // Used in GammaRay integration.
 
     void setCoreFileName(const QString &core, bool isSnapshot = false);