add missing .pb.go to list of generated files (#12419)
add missing .pb.go to list of generated files (#12419)


geeknoid/istio,smawson/istio,smawson/istio,geeknoid/istio,istio/istio,smawson/istio,geeknoid/istio,smawson/istio,istio/istio,geeknoid/istio,istio/istio,smawson/istio,geeknoid/istio,smawson/istio,istio/istio,geeknoid/istio,istio/istio