Windows: Updates Windows Vendoring

Updates windows dependent libraries for vendoing.

vendor/github.com/Microsoft/hcsshim/test/functional/utilities/tempdir.go

@@ -0,0 +1,15 @@
+package testutilities
+
+import (
+	"io/ioutil"
+	"testing"
+)
+
+// CreateTempDir creates a temporary directory
+func CreateTempDir(t *testing.T) string {
+	tempDir, err := ioutil.TempDir("", "test")
+	if err != nil {
+		t.Fatalf("failed to create temporary directory: %s", err)
+	}
+	return tempDir
+}