[wasm] Properly plumb the origin of the WASM module from asm.js translation.

test/mjsunit/wasm/asm-wasm.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --expose-wasm
 
 function EmptyTest() {
   "use asm";
   function caller() {
     empty();
@@ skipping 1522 matching lines @@
       var x = 0;
       x = HEAP32[0] & -1;
       return x | 0;
     }
     return {func: func};
   }
 
   var m = _WASMEXP_.instantiateModuleFromAsm(Module.toString());
   assertEquals(0, m.func());
 })();
+
+(function TestOutOfBoundsConversion() {
+  function asmModule($a,$b,$c){'use asm';
+    function aaa() {
+      var f = 0.0;
+      var a = 0;
+      f = 5616315000.000001;
+      a = ~~f >>>0;
+      return a | 0;
+    }
+    return { main : aaa };
+  }
+  var wasm = _WASMEXP_.instantiateModuleFromAsm(asmModule.toString());
+  assertEquals(1321347704, wasm.main());
+})();