Warn if kit has no tool chain set up

Change-Id: I551402c1e3023feeeb127f001a0e908938a07fc2
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

src/plugins/genericprojectmanager/genericmakestep.h

@@ -85,6 +85,7 @@ private:
     QString m_makeArguments;
     QString m_makeCommand;
     bool m_clean;
+    QList<ProjectExplorer::Task> m_tasks;
 };
 
 class GenericMakeStepConfigWidget : public ProjectExplorer::BuildStepConfigWidget