Add a helper to get canonical code from status
diff --git a/build.yaml b/build.yaml
index d757846..5554b67 100644
--- a/build.yaml
+++ b/build.yaml
@@ -758,6 +758,7 @@
   - include/grpc++/impl/codegen/service_type.h
   - include/grpc++/impl/codegen/status.h
   - include/grpc++/impl/codegen/status_code_enum.h
+  - include/grpc++/impl/codegen/status_helper.h
   - include/grpc++/impl/codegen/string_ref.h
   - include/grpc++/impl/codegen/stub_options.h
   - include/grpc++/impl/codegen/sync.h