Update dependencies

Among others, this updates minio-go, so that the new "eu-west-3" zone
for AWS is supported.

vendor/golang.org/x/text/cmd/gotext/generate.go

@@ -0,0 +1,31 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"golang.org/x/text/message/pipeline"
+)
+
+func init() {
+	out = cmdGenerate.Flag.String("out", "", "output file to write to")
+}
+
+var cmdGenerate = &Command{
+	Run:       runGenerate,
+	UsageLine: "generate <package>",
+	Short:     "generates code to insert translated messages",
+}
+
+func runGenerate(cmd *Command, config *pipeline.Config, args []string) error {
+	config.Packages = args
+	s, err := pipeline.Extract(config)
+	if err != nil {
+		return wrap(err, "extraction failed")
+	}
+	if err := s.Import(); err != nil {
+		return wrap(err, "import failed")
+	}
+	return wrap(s.Generate(), "generation failed")
+}