Squish: Add workaround for tst_HELP02

Change-Id: I61307ccd86246cdbe131f89e13521be8942c22a1
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Debugger: Robustify QMetaObject extraction.

LLDB manages to extract a QAction metaobject from any
plain int and classes without any bases.

Change-Id: I22cdd8e5c73d21d837772be83087dc065698db30
Reviewed-by: Christian Stenger <christian.stenger@digia.com>