Update Vendor

(*) github.com/Microsoft/hcsshim
    (*) golang.org/x/sys
    (*) github.com/x/cyrpto
    (*) github.com/sirupsen/logrus
    (*) github.com/Microsoft/go-winio
    (*) github.com/juju/errors
    (*) github.com/buger/jsonparser

vendor/github.com/Microsoft/hcsshim/internal/wclayer/destroylayer.go

@@ -0,0 +1,23 @@
+package wclayer
+
+import (
+	"github.com/Microsoft/hcsshim/internal/hcserror"
+	"github.com/sirupsen/logrus"
+)
+
+// DestroyLayer will remove the on-disk files representing the layer with the given
+// path, including that layer's containing folder, if any.
+func DestroyLayer(path string) error {
+	title := "hcsshim::DestroyLayer "
+	logrus.Debugf(title+"path %s", path)
+
+	err := destroyLayer(&stdDriverInfo, path)
+	if err != nil {
+		err = hcserror.Errorf(err, title, "path=%s", path)
+		logrus.Error(err)
+		return err
+	}
+
+	logrus.Debugf(title+"succeeded path=%s", path)
+	return nil
+}