update all vendored dependencies

vendor/cloud.google.com/go/internal/annotate.go

@@ -0,0 +1,54 @@
+// Copyright 2017 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package internal
+
+import (
+	"fmt"
+
+	"google.golang.org/api/googleapi"
+	"google.golang.org/grpc/status"
+)
+
+// Annotate prepends msg to the error message in err, attempting
+// to preserve other information in err, like an error code.
+//
+// Annotate panics if err is nil.
+//
+// Annotate knows about these error types:
+// - "google.golang.org/grpc/status".Status
+// - "google.golang.org/api/googleapi".Error
+// If the error is not one of these types, Annotate behaves
+// like
+//   fmt.Errorf("%s: %v", msg, err)
+func Annotate(err error, msg string) error {
+	if err == nil {
+		panic("Annotate called with nil")
+	}
+	if s, ok := status.FromError(err); ok {
+		p := s.Proto()
+		p.Message = msg + ": " + p.Message
+		return status.ErrorProto(p)
+	}
+	if g, ok := err.(*googleapi.Error); ok {
+		g.Message = msg + ": " + g.Message
+		return g
+	}
+	return fmt.Errorf("%s: %v", msg, err)
+}
+
+// Annotatef uses format and args to format a string, then calls Annotate.
+func Annotatef(err error, format string, args ...interface{}) error {
+	return Annotate(err, fmt.Sprintf(format, args...))
+}

vendor/cloud.google.com/go/internal/retry.go

@@ -15,7 +15,6 @@
 package internal
 
 import (
-	"fmt"
 	"time"
 
 	gax "github.com/googleapis/gax-go"
@@ -48,7 +47,7 @@ func retry(ctx context.Context, bo gax.Backoff, f func() (stop bool, err error),
 		p := bo.Pause()
 		if cerr := sleep(ctx, p); cerr != nil {
 			if lastErr != nil {
-				return fmt.Errorf("%v; last function err: %v", cerr, lastErr)
+				return Annotatef(lastErr, "retry failed with %v; last error", cerr)
 			}
 			return cerr
 		}

vendor/cloud.google.com/go/internal/version/version.go

@@ -26,7 +26,7 @@ import (
 
 // Repo is the current version of the client libraries in this
 // repo. It should be a date in YYYYMMDD format.
-const Repo = "20170621"
+const Repo = "20180118"
 
 // Go returns the Go runtime version. The returned string
 // has no whitespace.