We were not respecting the terms of the license that this piece
of code requests for redistribution.

I noticed this when investigating adding a new third_party library
and wanted to display its license in about:credits. This change
adds a special file that the licnese check in Chrome uses and
fixes the naming of the README for this script.

Bug: None
Change-Id: Ib33e9fe4a4e5b2968780bb6d8d6b39119b0361a7
Reviewed-on: https://chromium-review.googlesource.com/c/1323855Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>