vendor: Update github.com/gogo/protobuf, keeping all files

gvt fetch -a, because we need the protobuf files etc for regeneration

vendor/github.com/gogo/protobuf/io/uint32_test.go

@@ -0,0 +1,38 @@
+package io_test
+
+import (
+	"encoding/binary"
+	"io/ioutil"
+	"math/rand"
+	"testing"
+	"time"
+
+	"github.com/gogo/protobuf/test"
+	example "github.com/gogo/protobuf/test/example"
+
+	"github.com/gogo/protobuf/io"
+)
+
+func BenchmarkUint32DelimWriterMarshaller(b *testing.B) {
+	w := io.NewUint32DelimitedWriter(ioutil.Discard, binary.BigEndian)
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	msg := example.NewPopulatedA(r, true)
+
+	for i := 0; i < b.N; i++ {
+		if err := w.WriteMsg(msg); err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkUint32DelimWriterFallback(b *testing.B) {
+	w := io.NewUint32DelimitedWriter(ioutil.Discard, binary.BigEndian)
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	msg := test.NewPopulatedNinOptNative(r, true)
+
+	for i := 0; i < b.N; i++ {
+		if err := w.WriteMsg(msg); err != nil {
+			b.Fatal(err)
+		}
+	}
+}