fix build after merge of outdated PR
this broke after
was merged but the PR was outdated.
```
[2019-08-28T00:27:12.031Z] builder/dockerfile/copy.go:566:29: too many arguments in call to system.MkdirAll
[2019-08-28T00:27:12.031Z] 	have (string, number, string)
[2019-08-28T00:27:12.031Z] 	want (string, os.FileMode)
```
@@ -563,7 +563,7 @@ func copyFile(archiver Archiver, source, dest *copyEndpoint, identity *idtools.I
// are of the form \\?\Volume{<GUID>}\<path>. An example would be:
// \\?\Volume{dae8d3ac-b9a1-11e9-88eb-e8554b2ba1db}\bin\busybox.exe
- if err := system.MkdirAll(filepath.Dir(dest.path), 0755, ""); err != nil {
+ if err := system.MkdirAll(filepath.Dir(dest.path), 0755); err != nil {
return err
}
} else {
