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: I8ddc6e5fa0f6b10d80c75d5952df8ddd311cf892
Reviewed-on: https://gerrit.libreoffice.org/61591
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>