This enables by the default the
  export * as foo from "bar"
syntax in modules.

Bug: v8:8101
Change-Id: I98b07d217ae08ff6a556e69cb3bf6e8f4bd46a07
Reviewed-on: https://chromium-review.googlesource.com/c/1282972Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56732}