[wasm] include JS conformance tests in Wasm mjsunit tests

test/mjsunit/mjsunit.isolate

 # 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.
 {
   'variables': {
     'files': [
       './',
       '../../tools/codemap.js',
       '../../tools/consarray.js',
       '../../tools/csvparser.js',
       '../../tools/logreader.js',
       '../../tools/profile.js',
       '../../tools/profile_view.js',
       '../../tools/profviz/composer.js',
       '../../tools/splaytree.js',
       '../../tools/tickprocessor.js',
-      '../../tools/dumpcpp.js'
+      '../../tools/dumpcpp.js',
+      '../wasm-js/',
     ],
   },
   'includes': [
     '../../src/d8.isolate',
     '../../tools/testrunner/testrunner.isolate',
   ],
-}
+}