gRPC change needs to be integrated so that Envoy keeps working with Bazel 0.29

[lberki]

Bazel 0.29 reshuffled protocol buffers slightly and it broke gRPC which tried to guess what Bazel does. The Bazel bug is here:

bazelbuild/bazel#9032

The pull request to gRPC to fix it:

grpc/grpc#19860

however, it'll need to be integrated into Envoy so that Envoy keeps working.

[mattklein123]

cc @keith @lizan

[keith]

I'd be happy to update once that change merges. Is there going to be a release with it? (I assume no)

[lberki]

Dunno... ask the gRPC folks.

[lizan]

OK, at least we have a patch when we upgrade our Bazel. We're already in bazelisk so there are less chance to break CI widely when updating build image.

[mattklein123]

Fixed