[wasm][asm.js] Fix and enable several asm.js tests with the new parser.

test/mjsunit/asm/regress-669899.js

 // Copyright 2016 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: --validate-asm --fast-validate-asm
+
 try {
 (function () {
 })();
 } catch(e) {; }
   function __f_113() {
   }
 (function () {
 function __f_89() {
   "use asm";
   function __f_63(__v_26, __v_28) {
     __v_26 = __v_26|0;
     __v_28 = __v_28|0;
   }
   function __f_21(table_id, fun_id, arg1, arg2) {
     table_id = table_id|0;
     fun_id = fun_id|0;
     arg1 = arg1|0;
     arg2 = arg2|0;
   }
   var __v_17 = [];
 }
 var module = __f_89();
 })();