9696 add /etc/system.d support
Portions contributed by: Andy Fiddaman <andy@omniosce.org>
Reviewed by: Hans Rosenfeld <hans.rosenfeld@joyent.com>
Reviewed by: Peter Tribble <peter.tribble@gmail.com>
Reviewed by: C Fraire <cfraire@me.com>
Reviewed by: Toomas Soome <tsoome@me.com>

@@ -544,10 +544,11 @@
  * global function and data declarations
  */
 extern kmutex_t mod_lock;
 
 extern char *systemfile;
+extern char *self_assembly;
 extern char **syscallnames;
 extern int moddebug;
 
 /*
  * this is the head of a doubly linked list.  Only the next and prev