KitInformationConfigWidget: Make id of KitInformation accessible

Make the id of the kitinformation the config widget is configuring
accessible from the widget.

Change-Id: I15af2cfc18ab2ba012d43c3c6b71ee0011f994ad
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/projectexplorer/kitconfigwidget.cpp

@@ -38,4 +38,9 @@ KitConfigWidget::KitConfigWidget(Kit *kit, const KitInformation *ki) : m_kit(kit
     m_kitInformation(ki), m_isSticky(kit->isSticky(ki->id()))
 { }
 
+Core::Id KitConfigWidget::kitInformationId() const
+{
+    return m_kitInformation->id();
+}
+
 } // namespace ProjectExplorer