protos: Move builder_config proto from lucicfg to proto repo

This is David's proto from https://crrev.com/c/1515372, with a few
tweaks to get the right package, etc.

I swapped the proto's Trinary for a protobuf.BoolValue to avoid a
dependency on luci-go (and since it's more idiomatic).

BUG=chromium:940955
TEST=generate.sh

Change-Id: I0086a996a58095df8ec04404baa32e70b2dcf364
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/1518492
Reviewed-by: Lann Martin <lannm@chromium.org>
Tested-by: Sean Abraham <seanabraham@chromium.org>
Trybot-Ready: Sean Abraham <seanabraham@chromium.org>
Commit-Queue: Sean Abraham <seanabraham@chromium.org>
2 files changed
tree: 67ace6c373ee50c5fd3aa5141318204c6b751b1f
  1. go/
  2. infra/
  3. recipes/
  4. src/
  5. .gitignore
  6. generate.sh