message: Returned kythe_proto_output.h as the top include
diff: // See the License for the specific language governing permissions and
  // limitations under the License.
  +#include "verilog/tools/kythe/kythe_proto_output.h"
  +
  #ifndef _WIN32
  #include <unistd.h> // for STDOUT_FILENO
  #else
  #include "third_party/proto/kythe/storage.pb.h"
  #include "verilog/tools/kythe/kythe_facts.h"
  #include "verilog/tools/kythe/kythe_facts_extractor.h"
  -#include "verilog/tools/kythe/kythe_proto_output.h"
  namespace verilog {
  namespace kythe {
  