Introduce containerd-shim-runhcs-v1 on Windows

Implements the containerd-shim-runhcs-v1 shim on Windows for the runtime
v2 shim API.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>

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

@@ -0,0 +1,23 @@
+package wclayer
+
+import (
+	"github.com/Microsoft/hcsshim/internal/hcserror"
+	"github.com/sirupsen/logrus"
+)
+
+// CreateLayer creates a new, empty, read-only layer on the filesystem based on
+// the parent layer provided.
+func CreateLayer(path, parent string) error {
+	title := "hcsshim::CreateLayer "
+	logrus.Debugf(title+"Flavour %d ID %s parent %s", path, parent)
+
+	err := createLayer(&stdDriverInfo, path, parent)
+	if err != nil {
+		err = hcserror.Errorf(err, title, "path=%s parent=%s flavour=%d", path, parent)
+		logrus.Error(err)
+		return err
+	}
+
+	logrus.Debugf(title+" - succeeded path=%s parent=%s flavour=%d", path, parent)
+	return nil
+}