REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3246

MdeLibs.dsc.inc was added for some basic/default library
instances provided by MdePkg and RegisterFilterLibNull Library
was also added into it as the first version of MdeLibs.dsc.inc.

So update platform dsc to consume MdeLibs.dsc.inc for
RegisterFilterLibNull which will be consumed by IoLib and BaseLib.

Cc: Andrew Fish <afish@apple.com>
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
---
 EmulatorPkg/EmulatorPkg.dsc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/EmulatorPkg/EmulatorPkg.dsc b/EmulatorPkg/EmulatorPkg.dsc
index a7ded49000..b8d1d12ace 100644
--- a/EmulatorPkg/EmulatorPkg.dsc
+++ b/EmulatorPkg/EmulatorPkg.dsc
@@ -2,11 +2,11 @@
 # UEFI/PI Emulation Platform with UEFI HII interface supported.
 #
 # The Emulation Platform can be used to debug individual modules, prior to creating
 # a real platform. This also provides an example for how an DSC is created.
 #
-# Copyright (c) 2006 - 2020, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2006 - 2021, Intel Corporation. All rights reserved.<BR>
 # Portions copyright (c) 2010 - 2011, Apple Inc. All rights reserved.<BR>
 # Copyright (c) Microsoft Corporation.
 #
 # SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -43,10 +43,12 @@ [Defines]
 
 [SkuIds]
   0|DEFAULT
 
 [LibraryClasses]
+  !include MdePkg/MdeLibs.dsc.inc
+
   #
   # Entry point
   #
   PeiCoreEntryPoint|MdePkg/Library/PeiCoreEntryPoint/PeiCoreEntryPoint.inf
   PeimEntryPoint|MdePkg/Library/PeimEntryPoint/PeimEntryPoint.inf
--
2.18.0.windows.1