GitLab

Generate DIR_METADATA files
and remove metadata from OWNERS files
for //buildtools.

Bug: 1113033
Change-Id: I54fdf94f060220d189ce9c843e02fc22f12df623
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2438877
Commit-Queue: Dirk Pranke <dpranke@google.com>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Cr-Commit-Position: refs/heads/master@{#811878}