CryptoPkg: Add extra build option to disable VS build warning

openssl/include/openssl/lhash.h will bring C4090 build warning
issue, which is one known issue for OpenSSL under Visual Studio
toolchain.
Refer to https://github.com/openssl/openssl/issues/2214 for more
discussions against this.
Use /wd4090 to silence this build warning until OpenSSL fix this.

Cc: Ting Ye <ting.ye@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Gary Lin <glin@suse.com>
Cc: Ronald Cron <ronald.cron@arm.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qin Long <qin.long@intel.com>
Reviewed-by: Ting Ye <ting.ye@intel.com>

CryptoPkg/Library/TlsLib/TlsLib.inf

@@ -1,7 +1,7 @@
 ## @file
 #  SSL/TLS Wrapper Library Instance based on OpenSSL.
 #
-#  Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2016 - 2017, Intel Corporation. All rights reserved.<BR>
 #  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
@@ -47,3 +47,10 @@
   OpensslLib
   IntrinsicLib
   PrintLib
+
+[BuildOptions]
+  #
+  # suppress the following warnings so we do not break the build with warnings-as-errors:
+  # C4090: 'function' : different 'const' qualifiers
+  #
+  MSFT:*_*_*_CC_FLAGS = /wd4090