looks for variables that can be declared const and static i.e. they can
be stored in the read-only linker segment and shared between different
processes

Change-Id: I577fb2070604003e56fb44f8a02c9684070311cf
Reviewed-on: https://gerrit.libreoffice.org/61817
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>