Add the new location of the QtXML snippets to qtcore.qdocconf.
Add the new location of the QtXML snippets to qtcore.qdocconf.

Change-Id: I8e02b2876e4f03e24953aaf3ddfbbd4f0bed40ef
Reviewed-by: Jerome Pasion <c10995d24f6b454503389e8d00d837aef038985d@nokia.com>

kobolabs/qtdoc,kobolabs/qtdoc,kobolabs/qtdoc,kobolabs/qtdoc