packages.proto: Add NeedsChromeSource endpoint.

BUG=chromium:1086714
TEST=./generate.sh

Change-Id: Icabbd23fa0ef51b49d5fb4ea668929a54d8221b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2411808
Reviewed-by: Michael Mortensen <mmortensen@google.com>
Commit-Queue: Alex Klein <saklein@chromium.org>
2 files changed