and teach the plugin about code that takes the address of a function

Change-Id: Ia9d5afef44520aca236659e8176f1e27135ef4fc
Reviewed-on: https://gerrit.libreoffice.org/22861Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>