wayland-compositor: Set server mode

Summary:
If we don't set server mode we can deadlock when trying to use functions
that way for server mode to become set.

This can currently cause a startup freeze in e_scale_init().

Reviewers: zmike, devilhorns

Reviewed By: devilhorns

Subscribers: cedric

Differential Revision: https://phab.enlightenment.org/D2520

src/bin/e_comp_wl.c

@@ -2578,6 +2578,8 @@ e_comp_wl_init(void)
         return EINA_FALSE;
      }
 
+   ecore_wl_server_mode_set(1);
+
    /* try to init ecore_wayland */
    if (!ecore_wl_init(NULL))
      {