The shape needs to be flipped to compensate the change of
mbFlipH/mbFlipV.

Change-Id: I7b680497fee6ae9ed7bbd6f4ed9089d1a25a1deb
Reviewed-on: https://gerrit.libreoffice.org/42766Reviewed-by: Tamás Zolnai <tamas.zolnai@collabora.com>
Tested-by: Tamás Zolnai <tamas.zolnai@collabora.com>