Backport @10366 to 3.6

src/debug.h

Index: src/debug.h
===================================================================
--- src/debug.h	(revision 10379)
+++ src/debug.h	(working copy)
@@ -178,7 +178,9 @@
 
  private:
   // Calculate the hash value from the key (script id).
-  static uint32_t Hash(int key) { return ComputeIntegerHash(key); }
+  static uint32_t Hash(int key) {
+    return ComputeIntegerHash(key, v8::internal::kZeroHashSeed);
+  }
 
   // Scripts match if their keys (script id) match.
   static bool ScriptMatch(void* key1, void* key2) { return key1 == key2; }