Debugger[CDB]: Add version number to QtInfo struct in ext lib.

Run in a loop over qtVersion =4,5 when detecting the Qt modules
(quick detection). Add version field for later evaluation in
dumpers.
Reformat comments.

Change-Id: Ia3005fccbb92b847a0f1feef99a53eb4c318246f
Reviewed-on: http://codereview.qt.nokia.com/313


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>