CryptoPkg: Add Null instance of the TlsLib class

https://bugzilla.tianocore.org/show_bug.cgi?id=2258

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

@@ -0,0 +1,13 @@
+// /** @file
+// SSL/TLS Wrapper Null Library Instance.
+//
+// Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT             #language en-US "SSL/TLS Wrapper Null Library Instance"
+
+#string STR_MODULE_DESCRIPTION          #language en-US "This module provides SSL/TLS Wrapper Null Library Instance."