Debugger: Fix buglets in QVariant dumpers

Change-Id: I3ac3906600369b51f6fc9f6430f95f21e0ac3e3b
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: Work on LLDB address calculations

Change-Id: Iea68df0e7077a185223a68cc504fff5a5b9391ac
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: Better QObject display with LLDB

Change-Id: Ide88fd07e077a158223a68cc504fff5a5b9391ac
Reviewed-by: hjk <hjk121@nokiamail.com>