Bump buildkit to master and fix versions incompatible with go mod 1.13

Bump github.com/gogo/googleapis to v1.3.2
Bump github.com/docker/cli to master

Signed-off-by: Silvin Lubecki <silvin.lubecki@docker.com>

vendor/github.com/containerd/continuity/fs/copy_windows.go

@@ -1,49 +0,0 @@
-/*
-   Copyright The containerd Authors.
-
-   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 fs
-
-import (
-	"io"
-	"os"
-
-	"github.com/pkg/errors"
-)
-
-func copyFileInfo(fi os.FileInfo, name string) error {
-	if err := os.Chmod(name, fi.Mode()); err != nil {
-		return errors.Wrapf(err, "failed to chmod %s", name)
-	}
-
-	// TODO: copy windows specific metadata
-
-	return nil
-}
-
-func copyFileContent(dst, src *os.File) error {
-	buf := bufferPool.Get().(*[]byte)
-	_, err := io.CopyBuffer(dst, src, *buf)
-	bufferPool.Put(buf)
-	return err
-}
-
-func copyXAttrs(dst, src string, xeh XAttrErrorHandler) error {
-	return nil
-}
-
-func copyDevice(dst string, fi os.FileInfo) error {
-	return errors.New("device copy not supported")
-}