vendor: update buildkit and dockerd

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/github.com/tonistiigi/fsutil/tarwriter.go

@@ -0,0 +1,72 @@
+package fsutil
+
+import (
+	"archive/tar"
+	"context"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/pkg/errors"
+	"github.com/tonistiigi/fsutil/types"
+)
+
+func WriteTar(ctx context.Context, fs FS, w io.Writer) error {
+	tw := tar.NewWriter(w)
+	err := fs.Walk(ctx, func(path string, fi os.FileInfo, err error) error {
+		stat, ok := fi.Sys().(*types.Stat)
+		if !ok {
+			return errors.Wrapf(err, "invalid fileinfo without stat info: %s", path)
+		}
+		hdr, err := tar.FileInfoHeader(fi, stat.Linkname)
+		if err != nil {
+			return err
+		}
+
+		name := filepath.ToSlash(path)
+		if fi.IsDir() && !strings.HasSuffix(name, "/") {
+			name += "/"
+		}
+		hdr.Name = name
+
+		hdr.Uid = int(stat.Uid)
+		hdr.Gid = int(stat.Gid)
+		hdr.Devmajor = stat.Devmajor
+		hdr.Devminor = stat.Devminor
+		hdr.Linkname = stat.Linkname
+		if hdr.Linkname != "" {
+			hdr.Size = 0
+			hdr.Typeflag = tar.TypeLink
+		}
+
+		if len(stat.Xattrs) > 0 {
+			hdr.PAXRecords = map[string]string{}
+		}
+		for k, v := range stat.Xattrs {
+			hdr.PAXRecords["SCHILY.xattr."+k] = string(v)
+		}
+
+		if err := tw.WriteHeader(hdr); err != nil {
+			return errors.Wrap(err, "failed to write file header")
+		}
+
+		if hdr.Typeflag == tar.TypeReg && hdr.Size > 0 && hdr.Linkname == "" {
+			rc, err := fs.Open(path)
+			if err != nil {
+				return err
+			}
+			if _, err := io.Copy(tw, rc); err != nil {
+				return err
+			}
+			if err := rc.Close(); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+	if err != nil {
+		return err
+	}
+	return tw.Close()
+}