CryptoPkg: Add Null instance of the BaseCryptLib class

https://bugzilla.tianocore.org/show_bug.cgi?id=2257

Add a Null instance of the BaseCryptLib class.  This lib instance
can be used as a template for new implementations of the BaseCryptLib
class and can also be used to reduce CI build times for build
checks that depend on the BaseCryptLib class.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Xiaoyu Lu <xiaoyux.lu@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>

CryptoPkg/Library/BaseCryptLibNull/BaseCryptLibNull.uni

@@ -0,0 +1,18 @@
+// /** @file
+// Cryptographic Library Null Instance.
+//
+// Caution: This module requires additional review when modified.
+// This library will have external input - signature.
+// This external input must be validated carefully to avoid security issues such as
+// buffer overflow or integer overflow.
+//
+// Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+#string STR_MODULE_ABSTRACT             #language en-US "Cryptographic Library Null Instance"
+
+#string STR_MODULE_DESCRIPTION          #language en-US "Caution: This is a null version of your crypto library and SHOULD NOT be used on any product ever."
+