[asm] Fix lots of invalid asm.js tests

test/mjsunit/asm/if-tonumber.js

 // Copyright 2014 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.
 
 var stdlib = this;
 var buffer = new ArrayBuffer(64 * 1024);
 var foreign = {}
 
 function Module(stdlib, foreign, heap) {
   "use asm";
   function foo(i) {
     i = i|0;
-    if (i > 0) {
-      i = i == 1;
+    if ((i | 0) > 0) {
+      i = (i | 0) == 1;
     } else {
       i = 1;
     }
     return i & 1|0;
   }
   return { foo: foo };
 }
 
 var m = Module(stdlib, foreign, buffer);
 
 assertEquals(1, m.foo(-1));
 assertEquals(1, m.foo(-0));
 assertEquals(1, m.foo(0));
 assertEquals(1, m.foo(1));
 assertEquals(0, m.foo(2));
 assertEquals(1, m.foo(true));
 assertEquals(1, m.foo(false));