Ensure wx.Config related enums are present for SIP

Also adds unittests to ensure they remain present in Phoenix.

etg/config.py

@@ -22,6 +22,7 @@ DOCSTRING = ""
 ITEMS  = [ 'wxConfigBase',
            'wxFileConfig',
            'wxConfigPathChanger',
+           'interface_2wx_2config_8h.xml'
            ]
 
 #---------------------------------------------------------------------------

unittests/test_config.py

@@ -188,6 +188,14 @@ class ConfigTests(wtc.WidgetTestCase):
         if os.path.exists(name):
             os.remove(name)
 
+    def test_ConfigEnums(self):
+        # Test for presence of config enums
+        wx.CONFIG_USE_LOCAL_FILE
+        wx.CONFIG_USE_GLOBAL_FILE
+        wx.CONFIG_USE_RELATIVE_PATH
+        wx.CONFIG_USE_NO_ESCAPE_CHARACTERS
+        wx.CONFIG_USE_SUBDIR
+
 #---------------------------------------------------------------------------