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.cpp

@@ -1024,6 +1024,12 @@ DebuggerKitConfigWidget::DebuggerKitConfigWidget(Kit *workingCopy, const KitInfo
             this, SLOT(onDebuggerRemoved(QVariant)));
 }
 
+DebuggerKitConfigWidget::~DebuggerKitConfigWidget()
+{
+    delete m_comboBox;
+    delete m_manageButton;
+}
+
 QString DebuggerKitConfigWidget::toolTip() const
 {
     return tr("The debugger to use for this kit.");