Add crosfleet_tool field to ServiceVersion proto.

Change-Id: Ic7abc4b7a4214c6da5da4dd058980ea210f87ea1
Bug: 1176810
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2699350
Reviewed-by: Sean Abraham <seanabraham@chromium.org>
Reviewed-by: Taylor Clark <taylormade@google.com>
Commit-Queue: Taylor Clark <taylormade@google.com>
Commit-Queue: Jared Loucks <jaredloucks@google.com>
2 files changed