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.h

@@ -34,7 +34,7 @@
 #include <QGraphicsPolygonItem>
 #include <QGraphicsObject>
 
-namespace QmlObserver {
+namespace QmlJSDebugger {
 
 class QDeclarativeViewObserver;