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/Rand/CryptRandNull.c

@@ -0,0 +1,57 @@
+/** @file
+  Pseudorandom Number Generator Wrapper Implementation which does not provide
+  real capabilities.
+
+Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "InternalCryptLib.h"
+
+
+/**
+  Sets up the seed value for the pseudorandom number generator.
+
+  Return FALSE to indicate this interface is not supported.
+
+  @param[in]  Seed      Pointer to seed value.
+                        If NULL, default seed is used.
+  @param[in]  SeedSize  Size of seed value.
+                        If Seed is NULL, this parameter is ignored.
+
+  @retval FALSE  This interface is not supported.
+
+**/
+BOOLEAN
+EFIAPI
+RandomSeed (
+  IN  CONST  UINT8  *Seed  OPTIONAL,
+  IN  UINTN         SeedSize
+  )
+{
+  ASSERT (FALSE);
+  return FALSE;
+}
+
+/**
+  Generates a pseudorandom byte stream of the specified size.
+
+  Return FALSE to indicate this interface is not supported.
+
+  @param[out]  Output  Pointer to buffer to receive random value.
+  @param[in]   Size    Size of random bytes to generate.
+
+  @retval FALSE  This interface is not supported.
+
+**/
+BOOLEAN
+EFIAPI
+RandomBytes (
+  OUT  UINT8  *Output,
+  IN   UINTN  Size
+  )
+{
+  ASSERT (FALSE);
+  return FALSE;
+}