Add a command line tool that can either take a list of window ids and output
information on them using a verbose debug stream or embed foreign
windows using QWidget::createWindowContainer().

Task-number: QTBUG-41186
Change-Id: I14e436b5d08828f5b78b29e0701daeffe11367d3
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>