KitInformation: Delete subwidgets in destructor

Change-Id: I7e0a6d457aa26748758b6402955c81eae2c94782
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/debugger/debuggerkitconfigwidget.h

@@ -129,6 +129,7 @@ class DebuggerKitConfigWidget : public ProjectExplorer::KitConfigWidget
 public:
     DebuggerKitConfigWidget(ProjectExplorer::Kit *workingCopy,
                             const ProjectExplorer::KitInformation *ki);
+    ~DebuggerKitConfigWidget();
 
     QString displayName() const;
     QString toolTip() const;