GitLab

makesdk.go was deprecated and removed; use artifact tarballs generated
from the supported GN/ninja-based SDK build methods instead.

Change-Id: I6c3e3eb38451f2d0fbfc8940f3c4d4b5c6e89fef
Reviewed-on: https://chromium-review.googlesource.com/1237534Reviewed-by: Scott Graham <scottmg@chromium.org>
Commit-Queue: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593731}