Debugger: Show Qt version and dumper dir in failed autotests

Change-Id: I7520278266717e854dbb136a140381791f483c0c
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: avoid using sys.maxsize, Mac doesn't like it

Change-Id: Ie58d19d24a80b71527bb5381bb3cc33475f1f8cb
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: Adjust QList dumpers to LLDB needs

Change-Id: I01071510d422176b632bcaf93e009ad5056ea777
Reviewed-by: hjk <hjk121@nokiamail.com>