Update godeps for etcd 3.0.4

vendor/github.com/gogo/protobuf/proto/lib.go

@@ -70,6 +70,12 @@ for a protocol buffer variable v:
 	with distinguished wrapper types for each possible field value.
   - Marshal and Unmarshal are functions to encode and decode the wire format.
 
+When the .proto file specifies `syntax="proto3"`, there are some differences:
+
+  - Non-repeated fields of non-message type are values instead of pointers.
+  - Getters are only generated for message and oneof fields.
+  - Enum types do not get an Enum method.
+
 The simplest way to describe this is to see an example.
 Given file test.proto, containing
 
@@ -229,6 +235,7 @@ To create and play with a Test object:
 		test := &pb.Test{
 			Label: proto.String("hello"),
 			Type:  proto.Int32(17),
+			Reps:  []int64{1, 2, 3},
 			Optionalgroup: &pb.Test_OptionalGroup{
 				RequiredField: proto.String("good bye"),
 			},
@@ -441,7 +448,7 @@ func (p *Buffer) DebugPrint(s string, b []byte) {
 	var u uint64
 
 	obuf := p.buf
-	index := p.index
+	sindex := p.index
 	p.buf = b
 	p.index = 0
 	depth := 0
@@ -536,7 +543,7 @@ out:
 	fmt.Printf("\n")
 
 	p.buf = obuf
-	p.index = index
+	p.index = sindex
 }
 
 // SetDefaults sets unset protocol buffer fields to their default values.
@@ -881,3 +888,7 @@ func isProto3Zero(v reflect.Value) bool {
 	}
 	return false
 }
+
+// ProtoPackageIsVersion1 is referenced from generated protocol buffer files
+// to assert that that code is compatible with this version of the proto package.
+const GoGoProtoPackageIsVersion1 = true