Improve stack traces for async functions

src/js/prologue.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.
 
 (function(global, utils, extrasUtils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
@@ skipping 180 matching lines @@
     "IsPromise",
     "MapEntries",
     "MapIterator",
     "MapIteratorNext",
     "MaxSimple",
     "MinSimple",
     "NewPromiseCapability",
     "PerformPromiseThen",
     "PromiseThen",
     "PromiseCreate",
+    "PromiseNextMicrotaskID",
     "RegExpSubclassExecJS",
     "RegExpSubclassMatch",
     "RegExpSubclassReplace",
     "RegExpSubclassSearch",
     "RegExpSubclassSplit",
     "RegExpSubclassTest",
     "RejectPromise",
     "ResolvePromise",
     "SetIterator",
     "SetIteratorNext",
     "SetValues",
     "ToLocaleLowerCaseI18N",
     "ToLocaleUpperCaseI18N",
     "ToLowerCaseI18N",
     "ToPositiveInteger",
     "ToUpperCaseI18N",
     // From runtime:
     "is_concat_spreadable_symbol",
     "iterator_symbol",
+    "promise_async_stack_id_symbol",
     "promise_result_symbol",
     "promise_state_symbol",
     "promise_forwarding_handler_symbol",
     "promise_handled_by_symbol",
     "promise_handled_hint_symbol",
     "promise_has_handler_symbol",
     "object_freeze",
     "object_is_frozen",
     "object_is_sealed",
     "reflect_apply",
@@ skipping 125 matching lines @@
 
 extrasUtils.uncurryThis = function uncurryThis(func) {
   return function(thisArg, ...args) {
     return %reflect_apply(func, thisArg, args);
   };
 };
 
 %ToFastProperties(extrasUtils);
 
 })