libweston: Properly namespace modules entrypoint

Use different functions so we cannot load a libweston common module in
weston directly or the other way around.

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Reviewed-by: Daniel Stone <daniels@collabora.com>

compositor/cms-colord.c

@@ -34,6 +34,7 @@
 #include <colord.h>
 
 #include "compositor.h"
+#include "weston.h"
 #include "cms-helper.h"
 #include "shared/helpers.h"
 

compositor/systemd-notify.c

@@ -34,6 +34,7 @@
 #include "shared/string-helpers.h"
 #include "shared/zalloc.h"
 #include "compositor.h"
+#include "weston.h"
 
 struct systemd_notifier {
 	int watchdog_time;

compositor/weston.h

@@ -63,6 +63,10 @@ wet_get_config(struct weston_compositor *compositor);
 void *
 wet_load_module(const char *name, const char *entrypoint);
 
+int
+module_init(struct weston_compositor *compositor,
+	    int *argc, char *argv[]);
+
 int
 wet_load_xwayland(struct weston_compositor *comp);