be explicit about text rotations, fdo#70670

Change-Id: I5090a49c2383e6a30165a8eca22b527972c0f507
Reviewed-on: https://gerrit.libreoffice.org/9231
Reviewed-by: Kohei Yoshida <libreoffice@kohei.us>
Tested-by: Kohei Yoshida <libreoffice@kohei.us>