fdo#71622 compress svg files in ODF

Change-Id: I7d3bcff12a8f24d4d63851f578f9703bfaa25278
Reviewed-on: https://gerrit.libreoffice.org/8551
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>