clients/nested-client: call eglTerminate/eglReleaseThread at exit

Do a minimalistic teardown at program exist.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>

clients/nested-client.c

@@ -345,6 +345,8 @@ nested_client_destroy(struct nested_client *client)
 	wl_registry_destroy(client->registry);
 	wl_display_flush(client->display);
 	wl_display_disconnect(client->display);
+	eglTerminate(client->egl_display);
+	eglReleaseThread();
 }
 
 int