[PATCH] Export module_dummy_usage

Trivial patch.  We keep a dummy use count for old code which wants to
know its own usecount using GET_USE_COUNT.  It needs to be exported.

Thanks to Doug Ledford for the bug report.

kernel/module.c

@@ -1195,6 +1195,7 @@ static int __init init(void)
 
 /* Obsolete lvalue for broken code which asks about usage */
 int module_dummy_usage = 1;
+EXPORT_SYMBOL(module_dummy_usage);
 
 /* Call this at boot */
 __initcall(init);