Debugger: Add dumper for QTimeZone

Change-Id: I1b20529d7ecdcbf5480e95d6e7be89a2fdb6a8b7
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Debugger: Fix QSharedDataPointer dumper

Change-Id: Ie66044e0f5f71ecba509326081d93736e5d3d68a
Reviewed-by: Eike Ziller <eike.ziller@digia.com>