[Media Engagement] Fix preload bundling on Windows

Fix MEIPreload bundling on Windows to include it with
the Chromium installer.

BUG=180589

Change-Id: I530a859236f4f31f1f155b077366815de4badc7f
Reviewed-on: https://chromium-review.googlesource.com/c/1376100
Reviewed-by: Greg Thompson <grt@chromium.org>
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616717}
1 file changed