Debugger: Make QRegion and QThread dumper test pass on Mac

Both need DYLD_IMAGE_SUFFIX=_debug.

Change-Id: I5f5bb9ce630099a0e06bf261c4c7cc60ba876b9c
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: Use a more robust fallback for SBValue.Dereference

Change-Id: Ie81899017c7e711ea8b04d85f8298b0d73f1cbab
(cherry picked from commit 88114aba3ef4ccf2d1597e9a21dd49efb8c86717)
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: Make QVariant(QHostAddress) test pass with LLDB

Enums are printed differently. Accept the fact.

Change-Id: I8e1599517c7e711ea8b04d85f8298b0d73f1cbab
Reviewed-by: hjk <hjk121@nokiamail.com>