Bump protobuf version to latest release tag.
Bump protobuf version to latest release tag.

googlei18n/language-resources,googlei18n/language-resources,google/language-resources,googlei18n/language-resources,google/language-resources,google/language-resources,google/language-resources,google/language-resources,google/language-resources,googlei18n/language-resources,googlei18n/language-resources,googlei18n/language-resources