tapback: Fix InitWait for libxl

libxl waits for InitWait before running its scripts which will
eventually set hotplug-status = "true".  Since tapback is waiting for
hotplug-status = "true" before switching to InitWait, we have a
deadlock.

Switch unilaterally.  libxl writes its entries in a transaction, so we
should be okay.  hotplug_status_connected still waits for
hotplug-status, so we should be okay from advancing in other code.

Signed-off-by: Jason Andryuk <jandryuk@gmail.com>

tapback/frontend.c

@@ -439,8 +439,7 @@ frontend_changed(vbd_t * const device, const XenbusState state)
 
     switch (state) {
         case XenbusStateInitialising:
-			if (device->hotplug_status_connected)
-				err = xenbus_switch_state(device, XenbusStateInitWait);
+            err = xenbus_switch_state(device, XenbusStateInitWait);
             break;
         case XenbusStateInitialised:
     	case XenbusStateConnected: