Fix bug in _internal_copy_files where the rule would fail in downstream repositories.

Taken from https://github.com/protocolbuffers/upb/blob/main/bazel/protobuf.patch#L42

Fixes https://github.com/protocolbuffers/protobuf/issues/12620.

PiperOrigin-RevId: 528586464

Deanna Garcia committed 3y ago

859410bccc59aeeef1c48e34960fe93827767bac

Parent: 6be2818

Committed by Copybara-Service <copybara-worker@google.com> on 5/1/2023, 10:13:15 PM