CryptoPkg: BaseCryptLib: Add unit tests (Host and Shell based)

This adds a new INF for BaseCryptLib suitable for
host based environments. It adds a host based unit test for
BaseCryptLib that can also be built as a shell based Unit Test.

In addition, this also adds a UnitTestHostCrtWrapper.c file, which provides
some of the functionality not provided by the default host based unit test
system that OpenSSL expects. This is used by UnitTestHostBaseCryptLib, a
version of the BaseCryptLib meant specifically for host based unit testing.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Xiaoyu Lu <xiaoyux.lu@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Guomin Jiang <guomin.jiang@intel.com>
Signed-off-by: Matthew Carlson <matthewfcarlson@gmail.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>

CryptoPkg/Library/BaseCryptLib/SysCall/UnitTestHostCrtWrapper.c

@@ -0,0 +1,93 @@
+/** @file
+  C Run-Time Libraries (CRT) Wrapper Implementation for OpenSSL-based
+  Cryptographic Library.
+
+Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>
+Copyright (c) Microsoft Corporation
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <stdio.h>
+
+#include <Base.h>
+#include <Library/DebugLib.h>
+
+/* Convert character to lowercase */
+int tolower (int c)
+{
+  if (('A' <= (c)) && ((c) <= 'Z')) {
+    return (c - ('A' - 'a'));
+  }
+  return (c);
+}
+
+/* Compare first n bytes of string s1 with string s2, ignoring case */
+int strncasecmp (const char *s1, const char *s2, size_t n)
+{
+  int Val;
+
+  ASSERT(s1 != NULL);
+  ASSERT(s2 != NULL);
+
+  if (n != 0) {
+    do {
+      Val = tolower(*s1) - tolower(*s2);
+      if (Val != 0) {
+        return Val;
+      }
+      ++s1;
+      ++s2;
+      if (*s1 == '\0') {
+        break;
+      }
+    } while (--n != 0);
+  }
+  return 0;
+}
+
+/* Read formatted data from a string */
+int sscanf (const char *buffer, const char *format, ...)
+{
+  //
+  // Null sscanf() function implementation to satisfy the linker, since
+  // no direct functionality logic dependency in present UEFI cases.
+  //
+  return 0;
+}
+
+//
+//  -- Dummy OpenSSL Support Routines --
+//
+
+int BIO_printf (void *bio, const char *format, ...)
+{
+  return 0;
+}
+
+int BIO_snprintf(char *buf, size_t n, const char *format, ...)
+{
+  return 0;
+}
+
+uid_t getuid (void)
+{
+  return 0;
+}
+
+uid_t geteuid (void)
+{
+  return 0;
+}
+
+gid_t getgid (void)
+{
+  return 0;
+}
+
+gid_t getegid (void)
+{
+  return 0;
+}
+
+int errno = 0;