Add new go package for type (#517)
Add new go package for type (#517)

Signed-off-by: Kuat Yessenov <78a0b7007f2d7b7ec75106f37841ba73f23168e2@google.com>

lyft/envoy-api,jrajahalme/envoy-api,jrajahalme/envoy-api,lyft/envoy-api,lyft/envoy-api,jrajahalme/envoy-api,jrajahalme/envoy-api