OS-2564 zone boot failed: could not start zoneadmd

@@ -153,10 +153,11 @@
 /*
  * Console subsystem routines.
  */
 extern int init_console(zlog_t *);
 extern void serve_console(zlog_t *);
+extern void zcons_statechanged();
 
 /*
  * Memory capping thread creation.
  */
 extern void create_mcap_thread(zlog_t *, zoneid_t);