deb#905442 apparmor: fix saving files in enforced mode

deb#905442 apparmor: fix saving files in enforced mode

Add rule to allow creating temporary files like `lu6924jgpjkq.tmp`,
because without it files cannot be saved.

Change-Id: I640897df5d325e2d01da16840034abbd095fb276
Reviewed-on: https://gerrit.libreoffice.org/58672
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
(cherry picked from commit 8ca83479ab1f921a14a366432a513a904af0dd20)
Reviewed-on: https://gerrit.libreoffice.org/58677
Reviewed-by: Rene Engelhard <rene@debian.org>
Tested-by: Rene Engelhard <rene@debian.org>
Gbp-Pq: Name apparmor-fixes.diff