Add a test for a huge time value and month display

Bug: chromium:801602
Test: intl/date-format/month-far-future.js
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Ie2279680e8879c943cbf0873a933d2633e759212
Reviewed-on: https://chromium-review.googlesource.com/868376Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Jungshik Shin <jshin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50914}

test/intl/date-format/month-far-future.js

+// Copyright 2018 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.
+
+// Test for crbug.com/801602 .
+
+var locales = [
+    "en-u-ca-gregori",
+    "fa-u-ca-persian",
+    "ar-u-ca-islamic-civil",
+    "ar-u-ca-islamic-umalqura",
+    "ar-u-ca-islamic-tbla",
+    "ar-u-ca-islamic-rgsa",
+    "he-u-ca-hebrew",
+    "zh-u-ca-chinese",
+    "ko-u-ca-dangi",
+    "ja-u-ca-japanese",
+    "am-u-ca-ethiopic",
+    "am-u-ca-ethioaa",
+    "hi-u-ca-indian",
+    "th-u-ca-buddhist",
+];
+
+var hugeNum = 1.7976931348623157e+308;
+
+locales.forEach(function(loc) {
+  var df = new Intl.DateTimeFormat(loc, {month: "long"});
+  assertFalse(df.format(hugeNum) == '');
+}
+);