[intl] Fix build for noi18n mode

Fix issue created by patch https://codereview.chromium.org/2582993002/

CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux_noi18n_rel_ng
TBR=yangguo@chromium.org
BUG=v8:4360

Review-Url: https://codereview.chromium.org/2599973002
Cr-Commit-Position: refs/heads/master@{#41945}

test/mjsunit/regress/regress-4870.js

@@ -2,7 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-assertThrows(() => Object.getOwnPropertyDescriptor(Intl.Collator.prototype,
-                                                   'compare')
-                   .get.call(new Intl.DateTimeFormat())('a', 'b'),
-             TypeError)
+if (this.Intl) {
+  assertThrows(() => Object.getOwnPropertyDescriptor(Intl.Collator.prototype,
+                                                     'compare')
+                     .get.call(new Intl.DateTimeFormat())('a', 'b'),
+               TypeError)
+}