Move hash code from hidden string to a private symbol

src/math.js

Index: src/math.js
diff --git a/src/math.js b/src/math.js
index d620906d1893d2b0f92fc64e7d2e426cb9b6d1df..74ae1ee547f0d719e58ad687511a4c95a579f359 100644
--- a/src/math.js
+++ b/src/math.js
@@ -5,7 +5,6 @@
 var rngstate;  // Initialized to a Uint32Array during genesis.
 
 (function(global, utils) {
-
 "use strict";
 
 %CheckIsBootstrapping();
@@ -138,6 +137,15 @@ function MathRandom() {
   return (x < 0 ? (x + 0x100000000) : x) * 2.3283064365386962890625e-10;
 }
 
+function MathRandomRaw() {
+  var r0 = (MathImul(18030, rngstate[0] & 0xFFFF) + (rngstate[0] >>> 16)) | 0;
+  rngstate[0] = r0;
+  var r1 = (MathImul(36969, rngstate[1] & 0xFFFF) + (rngstate[1] >>> 16)) | 0;
+  rngstate[1] = r1;
+  var x = ((r0 << 16) + (r1 & 0xFFFF)) | 0;
+  return x & 0x3fffffff;
+}
+
 // ECMA 262 - 15.8.2.15
 function MathRound(x) {
   return %RoundNumber(TO_NUMBER_INLINE(x));
@@ -358,6 +366,7 @@ utils.Export(function(to) {
   to.MathAbs = MathAbs;
   to.MathExp = MathExp;
   to.MathFloor = MathFloorJS;
+  to.IntRandom = MathRandomRaw;
   to.MathMax = MathMax;
   to.MathMin = MathMin;
 });