Translated German comments - polygon and matrix calculations

Change-Id: I3b01520cca854e6504787077a15fbe150eef86d4
Reviewed-on: https://gerrit.libreoffice.org/7950
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>