8134493: Cleaning inline caches of unloaded nmethods should be done in sweeper

Clean ICs of unloaded nmethods in sweeper to avoid impact on safepoint duration.

Reviewed-by: kvn, mdoerr

hotspot/src/share/vm/code/nmethod.hpp

@@ -577,7 +577,7 @@ public:
 
   // See comment at definition of _last_seen_on_stack
   void mark_as_seen_on_stack();
-  bool can_not_entrant_be_converted();
+  bool can_convert_to_zombie();
 
   // Evolution support. We make old (discarded) compiled methods point to new Method*s.
   void set_method(Method* method) { _method = method; }