Disambiguate name of QLocalServer used in Browser example.

Append Qt version and engine name so that it does not lock
out the QtWebKit based browser and allows for comparing
different versions of Qt.

Remove outdated section within Q_WS_QWS.

Change-Id: I754db3ce78eefea88b97960af24ae628093e3c2a
Task-number: QTBUG-46233
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com>