eliminate dbgi layer evictor thread - exe and debug info eviction needs to be synchronous with control thread, to allow for HMH-style hotloading. this change moves all dbgi layer binary releasing to the caller thread of the refcount -> 0 dbgi_binary_close.

src/mule/mule_hotload_module_main.c

@@ -8,6 +8,6 @@ get_number(void)
     sum += i;
     sum += 1;
   }
-  sum = 0;
+  sum = 1000;
   return sum;
 }