Update vendored windows libs

libs/win/bugs/vista-symlink-islink-bug.py

@@ -0,0 +1,29 @@
+import os
+import sys
+
+try:
+    from jaraco.windows.filesystem import symlink
+except ImportError:
+    # a dirty reimplementation of symlink from jaraco.windows
+    from ctypes import windll
+    from ctypes.wintypes import LPWSTR, DWORD, BOOLEAN
+
+    CreateSymbolicLink = windll.kernel32.CreateSymbolicLinkW
+    CreateSymbolicLink.argtypes = (LPWSTR, LPWSTR, DWORD)
+    CreateSymbolicLink.restype = BOOLEAN
+
+    def symlink(link, target, target_is_directory=False):
+        """
+        An implementation of os.symlink for Windows (Vista and greater)
+        """
+        target_is_directory = target_is_directory or os.path.isdir(target)
+        CreateSymbolicLink(link, target, target_is_directory)
+
+
+assert sys.platform in ('win32',)
+os.makedirs(r'.\foo')
+assert os.path.isdir(r'.\foo')
+
+symlink(r'.\foo_sym', r'.\foo')
+assert os.path.isdir(r'.\foo_sym')
+assert os.path.islink(r'.\foo_sym')  # fails