logind: forward Active=true changes for non-DRM backends

Logind sends us a notification whenever the Active attribute of our session
changes. However, due to the way compositor-drm.c relies on the master DRM
device to be synced with the session, we used to delay Active=true
handling until the DRM device was up, too. See:

    commit aedc7732ebd9bc7b4f51ee247ea857ffec6260a7
    Author: David Herrmann <dh.herrmann@gmail.com>
    Date:   Sat Nov 30 11:25:45 2013 +0100

        logind: delay wakeup until DRM-device is resumed

However, the other compositor backends do not use DRM, so logind-util will
never get notified about any DRM device. Therefore, we have to forward the
Active=true change immediately.

This commit fixes logind-util to take sync_drm as argument. If it is true,
we do DRM-device synchronisation, otherwise we don't.

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=86889
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
Tested-by: nerdopolis <bluescreen_avenger@verizon.net>
diff --git a/src/launcher-util.h b/src/launcher-util.h
index d5b2fc9..a60f8a1 100644
--- a/src/launcher-util.h
+++ b/src/launcher-util.h
@@ -31,7 +31,7 @@
 
 struct weston_launcher *
 weston_launcher_connect(struct weston_compositor *compositor, int tty,
-			const char *seat_id);
+			const char *seat_id, bool sync_drm);
 
 void
 weston_launcher_destroy(struct weston_launcher *launcher);