Update vendored windows libs

libs/win/incubator/replace-file.py

@@ -0,0 +1,10 @@
+from jaraco.windows.api.filesystem import ReplaceFile
+
+open('orig-file', 'w').write('some content')
+open('replacing-file', 'w').write('new content')
+ReplaceFile('orig-file', 'replacing-file', 'orig-backup', 0, 0, 0)
+assert open('orig-file').read() == 'new content'
+assert open('orig-backup').read() == 'some content'
+import os
+
+assert not os.path.exists('replacing-file')

libs/win/incubator/trace-symlink.py

@@ -0,0 +1,22 @@
+from jaraco.windows.filesystem import trace_symlink_target
+
+from optparse import OptionParser
+
+
+def get_args():
+    parser = OptionParser()
+    options, args = parser.parse_args()
+    try:
+        options.filename = args.pop(0)
+    except IndexError:
+        parser.error('filename required')
+    return options
+
+
+def main():
+    options = get_args()
+    print(trace_symlink_target(options.filename))
+
+
+if __name__ == '__main__':
+    main()