Debugger: Add command for simpler dumper reloading

... to facilitate shorter round trips in dumper development.

Change-Id: Ie457293fd137528d74008fc11137b47d92f3859d
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/debugger/qml/qmlcppengine.h

@@ -97,6 +97,7 @@ public:
 
 protected:
     void detachDebugger();
+    void reloadDebuggingHelpers();
     void executeStep();
     void executeStepOut();
     void executeNext();