Silence std::experimental::filesystem deprecation warning in MSVC 2019

Journal/JournalStream.cc

-// Copyright 2019 Autodesk, Inc. All rights reserved.
+// Copyright 2020 Autodesk, Inc. All rights reserved.
 //
 // This computer source code and related instructions and comments are the
 // unpublished confidential and proprietary information of Autodesk, Inc.
@@ -19,8 +19,10 @@
 #ifdef JOURNAL_USE_BOOST
 #include <boost/filesystem.hpp>
 #else // JOURNAL_USE_BOOST
+// filesystem uses memcpy() in MSVC, suppress warnings
 INSECURE_INCLUDE_SECTION_BEGIN 
-#include <filesystem> // filesystem uses memcpy() in MSVC, suppress warnings
+#define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING
+#include <experimental/filesystem> 
 INSECURE_INCLUDE_SECTION_END
 #endif // JOURNAL_USE_BOOST