Revert of [wasm] Remove support for experimental version 0xD.

test/mjsunit/wasm/jsapi-harness.js

 // Copyright 2017 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.
 
-// TODO(titzer): update spec test suite to version 0x1
-if (false) {
-
 // TODO(eholk): Once we have stable test IDs, use those as the key instead.
 // See https://github.com/WebAssembly/spec/issues/415
 const known_failures = {
   "'WebAssembly.Module.customSections' method":
     'https://bugs.chromium.org/p/v8/issues/detail?id=5815',
   "'WebAssembly.Table.prototype.get' method":
     'https://bugs.chromium.org/p/v8/issues/detail?id=5507',
   "'WebAssembly.Table.prototype.set' method":
     'https://bugs.chromium.org/p/v8/issues/detail?id=5507',
 };
@@ skipping 54 matching lines @@
       } else {
         print(`  ${failures[i]}`);
         unexpected = true;
       }
     }
     if (unexpected) {
       quit(1);
     }
   }
 });
-
-}