fdo#78075 PDF Import: Use absolute positions in svg:d parameter

Change-Id: I55ddf92c43f849524be72bd10b3beb41e728f951
Reviewed-on: https://gerrit.libreoffice.org/9199
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>