Added experimental libcxx files, including filesystem/path (#7044)

Fixes #7022

AUTHORS

@@ -357,5 +357,6 @@ a license to everyone to use it as detailed in LICENSE.)
 * Patrick Berger <patrick.berger@xmail.net> (copyright owned by Compusoft Group)
 * Alexander Frank Lehmann <alexander.frank.lehmann@compusoftgroup.com> (copyright owned by Compusoft Group)
 * Tommy Nguyen <tn0502@gmail.com>
+* Thomas Schander <info@thomasschander.com> (copyright owned by Enscape GmbH)
 * Benjamin S. Rodgers <acdimalev@gmail.com>
 * Paul Shapiro <paul@mymonero.com>

tools/system_libs.py

@@ -291,7 +291,11 @@ def calculate(temp_files, in_temp, stdout_, stderr_, forced=[]):
       'utility.cpp',
       'valarray.cpp',
       'variant.cpp',
-      'vector.cpp'
+      'vector.cpp',
+      os.path.join('experimental', 'memory_resource.cpp'),
+      os.path.join('experimental', 'filesystem', 'directory_iterator.cpp'),
+      os.path.join('experimental', 'filesystem', 'path.cpp'),
+      os.path.join('experimental', 'filesystem', 'operations.cpp')
     ]
     libcxxabi_include = shared.path_from_root('system', 'lib', 'libcxxabi', 'include')
     return build_libcxx(