interactive/devices: Build unconditionally

The test-devices interactive test does not rely on the X11 API being
present any more, after the introduction of the device manager API.

tests/interactive/test-devices.c

@@ -1,7 +1,10 @@
 #include <stdlib.h>
 #include <gmodule.h>
 #include <clutter/clutter.h>
+
+#ifdef CLUTTER_WINDOWING_X11
 #include <clutter/x11/clutter-x11.h>
+#endif
 
 typedef struct {
   ClutterActor *stage;
@@ -218,8 +221,10 @@ test_devices_main (int argc, char **argv)
   ClutterDeviceManager *manager;
   const GSList *stage_devices, *l;
 
+#ifdef CLUTTER_WINDOWING_X11
   /* force enabling X11 support */
   clutter_x11_enable_xinput ();
+#endif
 
   if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
     return 1;