MdePkg: Add FdtLib gmock support

Add Google Mock Library for FdtLib

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Jeff Brasen <jbrasen@nvidia.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Gua Guo <gua.guo@intel.com>

MdePkg/Test/Mock/Library/GoogleTest/MockFdtLib/MockFdtLib.inf

@@ -0,0 +1,28 @@
+## @file
+# Google Test mocks for FdtLib
+#
+# Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# Copyright (c) 2023, Intel Corporation. All rights reserved.
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = MockFdtLib
+  FILE_GUID                      = 0f5471bc-fc2c-4cf4-b9f7-c1396d32831c
+  MODULE_TYPE                    = HOST_APPLICATION
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = FdtLib
+
+[Sources]
+  MockFdtLib.cpp
+
+[Packages]
+  MdePkg/MdePkg.dec
+  UnitTestFrameworkPkg/UnitTestFrameworkPkg.dec
+
+[LibraryClasses]
+  GoogleTestLib
+
+[BuildOptions]
+  MSFT:*_*_*_CC_FLAGS = /EHsc /bigobj