enable adding custom config widgets from a run control factory

To achieve this there are two methods in IRunControlFactory you
need to implement:

1) createRunConfigurationAspect returns a IRunConfigurationAspect
which stores the settings specific to your plugin.
2) createConfigurationWidget returns a RunConfigWidget that will
be shown in the project settings

Merge-request: 258
Reviewed-by: hjk <qtc-committer@nokia.com>

src/plugins/debugger/debuggerrunner.cpp

@@ -704,7 +704,7 @@ RunControl *DebuggerRunControlFactory::create
     return create(sp, runConfiguration);
 }
 
-QWidget *DebuggerRunControlFactory::createConfigurationWidget
+RunConfigWidget *DebuggerRunControlFactory::createConfigurationWidget
     (RunConfiguration *runConfiguration)
 {
     // NBS TODO: Add GDB-specific configuration widget