fdo#77027: ODF import: fix wrong version in check for embedded objects

SvXMLImport::LO_4x does not mean 4.0+ any more.

(regression from 92cb21ebeda98c5193c50c4cf7ef3d60611c2a52)

(cherry picked from commit 25a2eab22798373b8197f1e594568207eb7c5039)

Conflicts:
	sd/qa/unit/import-tests.cxx

Change-Id: Ib444762c2d6e4d051e99962eaff1b1ed34af983a
Reviewed-on: https://gerrit.libreoffice.org/9064
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
(cherry picked from commit 192963c3c1959389cb78e80bbc3e22e49fabcc73)
Reviewed-on: https://gerrit.libreoffice.org/9067
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Reviewed-by: Eike Rathke <erack@redhat.com>