weston: Properly namespace modules entrypoint

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Reviewed-by: Daniel Stone <daniels@collabora.com>
diff --git a/compositor/systemd-notify.c b/compositor/systemd-notify.c
index ce18ede..50f03cb 100644
--- a/compositor/systemd-notify.c
+++ b/compositor/systemd-notify.c
@@ -115,8 +115,8 @@
 }
 
 WL_EXPORT int
-module_init(struct weston_compositor *compositor,
-	    int *argc, char *argv[])
+wet_module_init(struct weston_compositor *compositor,
+		int *argc, char *argv[])
 {
 	char *watchdog_time_env;
 	struct wl_event_loop *loop;