gRPC change needs to be integrated so that Envoy keeps working with Bazel 0.29 #7835
Description
Bazel 0.29 reshuffled protocol buffers slightly and it broke gRPC which tried to guess what Bazel does. The Bazel bug is here:
The pull request to gRPC to fix it:
however, it'll need to be integrated into Envoy so that Envoy keeps working.