Merge pull request #437 from compnerd/vfs-shapped-fastener

Tests: add vfs overlay for dipsatch

Author: compnerd

Tests/Functional/lit.cfg

@@ -119,6 +119,7 @@ else:
                 '-L', os.path.join(libdispatch_build_dir, 'src'),
                 '-L', os.path.join(libdispatch_build_dir, 'src', 'BlocksRuntime'),
                 '-L', os.path.join(libdispatch_build_dir, 'src', 'swift'),
+                '-vfsoverlay', os.path.join(libdispatch_build_dir, 'dispatch-vfs-overlay.yaml'),
             ])
 
             if platform.system() != 'Windows':