QmlJSDebugger: Change namespace from QmlObserver to QmlJSDebugger

The library not only contains the observer part, but also the javascript
debugger. Reflect this in the namespace.

share/qtcreator/qmljsdebugger/editor/selectionindicator.cpp

@@ -36,7 +36,7 @@
 #include <QGraphicsScene>
 #include <QDebug>
 
-namespace QmlObserver {
+namespace QmlJSDebugger {
 
 SelectionIndicator::SelectionIndicator(QDeclarativeViewObserver *editorView, QGraphicsObject *layerItem)
     : m_layerItem(layerItem), m_view(editorView)
@@ -123,5 +123,5 @@ void SelectionIndicator::setItems(const QList<QWeakPointer<QGraphicsObject> > &i
     }
 }
 
-} //namespace QmlObserver
+} //namespace QmlJSDebugger