Resolves: fdo#81598 #i125300# enhanced handling of multiple ClipRegions...

in MetafileProcessor

(cherry picked from commit 02e2c7b225036c6478a1f7e8315a9c8361025a7f)

Change-Id: Iefefc36c040507795bc2c25fe8d4a610eb12adb9
(cherry picked from commit 2ddfaf1f03135c10d33e0e99ebe8a56d3783d214)
Reviewed-on: https://gerrit.libreoffice.org/10504
Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>