Merge pull request googleapis#2969 from dhermes/coverage-ignore-proto-pkg

Adding google.cloud.proto to list of ignored packages for coverage.

Author: dhermes

.coveragerc

@@ -7,6 +7,7 @@ omit =
     # Packages in the "google.cloud" package that we don't own.
     */google/cloud/gapic/*
     */google/cloud/grpc/*
+    */google/cloud/proto/*
 show_missing = True
 exclude_lines =
     # Re-enable the standard pragma