Use the real climit for testing the stack limit API. The currently...

src/execution.h

Index: src/execution.h
===================================================================
--- src/execution.h	(revision 5815)
+++ src/execution.h	(working copy)
@@ -189,6 +189,9 @@
   static uintptr_t climit() {
     return thread_local_.climit_;
   }
+  static uintptr_t real_climit() {
+    return thread_local_.real_climit_;
+  }
   static uintptr_t jslimit() {
     return thread_local_.jslimit_;
   }