logind: actually close fd in launcher_logind_close

We still need to close fds passed to us - or we leak quite a few fds
on VC switch.

Regression, originally fixed in 8f5acc2f3a
and re-broken in commit 72dea06d79
but only for the logind launcher.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

libweston/launcher-logind.c

@@ -216,6 +216,7 @@ launcher_logind_close(struct weston_launcher *launcher, int fd)
 	int r;
 
 	r = fstat(fd, &st);
+	close(fd);
 	if (r < 0) {
 		weston_log("logind: cannot fstat fd: %m\n");
 		return;