Add the BootState GUID to EdkCompatibilityPkg.dec and the accordingly GUID header file.

It’s to let the ECP platform boot in minimal mode in the non-first boot.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10217 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Compatibility/Include/Guid/BootState.h

@@ -0,0 +1,22 @@
+/** @file
+  GUID for use conveying the boot-state to PEI.
+
+  Copyright (c) 2010, Intel Corporation
+  All rights reserved. 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.
+
+**/
+#ifndef _BOOT_STATE_H_
+#define _BOOT_STATE_H_
+
+#define  EFI_BOOT_STATE_VARIABLE_GUID  \
+  { 0x60b5e939, 0xfcf, 0x4227, { 0xba, 0x83, 0x6b, 0xbe, 0xd4, 0x5b, 0xc0, 0xe3 } }
+
+extern EFI_GUID gEfiBootStateGuid;
+
+#endif