MdePkg/Library/BaseStackCheckLib: Add Null handler for VS2017/ARM

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Pete Batard <pete@akeo.ie>
Reviewed-by: Liming Gao <liming.gao@intel.com>

MdePkg/Library/BaseStackCheckLib/BaseStackCheckNull.c

@@ -0,0 +1,18 @@
+/*++
+
+ Copyright (c) 2018, 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.
+
+Abstract:
+
+  This file is purely empty as a work around for BaseStackCheck to pass MSVC build.
+
+**/
+
+extern int __BaseStackCheckNull;