UefiPayloadPkg: Add Secureboot support

Must use RuntimeVariableDxe instead of EmuVariableDxe.
Currently doesn't boot on qemu.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>

UefiPayloadPkg/SecureBootEnrollDefaultKeys/SecureBootSetupExtra.uni

@@ -0,0 +1,17 @@
+// /** @file
+// EsalVariableDxeSal Localized Strings and Content
+//
+// Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>
+//
+// This program and the accompanying materials
+// are licensed and made available under the terms and conditions of the BSD License
+// which accompanies this distribution. The full text of the license may be found at
+// http://opensource.org/licenses/bsd-license.php
+// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+//
+// **/
+
+#string STR_PROPERTIES_MODULE_NAME
+#language en-US
+"9elements Secure Boot DXE"