Issue #25622: Merge ctypes test from 3.4 into 3.5

Lib/ctypes/test/test_values.py

@@ -28,8 +28,7 @@ class ValuesTestCase(unittest.TestCase):
         ctdll = CDLL(_ctypes_test.__file__)
         self.assertRaises(ValueError, c_int.in_dll, ctdll, "Undefined_Symbol")
 
-@unittest.skipUnless(sys.platform == 'win32', 'Windows-specific test')
-class Win_ValuesTestCase(unittest.TestCase):
+class PythonValuesTestCase(unittest.TestCase):
     """This test only works when python itself is a dll/shared library"""
 
     def test_optimizeflag(self):