This way, the environment is correctly preserved for weston. Since
commit 636156d5f6, clearenv() is only
called when we open a new PAM session, so it makes sense to only use a
login shell in that case.
Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>