fix chown and seccomp

Signed-off-by: Jess Frazelle <acidburn@microsoft.com>

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

@@ -1,60 +0,0 @@
-// +build windows
-
-package fs
-
-import (
-	"context"
-	"os"
-	"path/filepath"
-)
-
-func diskUsage(roots ...string) (Usage, error) {
-	var (
-		size int64
-	)
-
-	// TODO(stevvooe): Support inodes (or equivalent) for windows.
-
-	for _, root := range roots {
-		if err := filepath.Walk(root, func(path string, fi os.FileInfo, err error) error {
-			if err != nil {
-				return err
-			}
-
-			size += fi.Size()
-			return nil
-		}); err != nil {
-			return Usage{}, err
-		}
-	}
-
-	return Usage{
-		Size: size,
-	}, nil
-}
-
-func diffUsage(ctx context.Context, a, b string) (Usage, error) {
-	var (
-		size int64
-	)
-
-	if err := Changes(ctx, a, b, func(kind ChangeKind, _ string, fi os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-
-		if kind == ChangeKindAdd || kind == ChangeKindModify {
-			size += fi.Size()
-
-			return nil
-
-		}
-		return nil
-	}); err != nil {
-		return Usage{}, err
-	}
-
-	return Usage{
-		Size: size,
-	}, nil
-}