scripts: Allow for skipping version_1_1 features

Treat 1.1 features as 1.0, instead of as an extension.
diff --git a/scripts/helper_file_generator.py b/scripts/helper_file_generator.py
index f47857a..ba88555 100644
--- a/scripts/helper_file_generator.py
+++ b/scripts/helper_file_generator.py
@@ -159,7 +159,7 @@
     def beginFeature(self, interface, emit):
         # Start processing in superclass
         OutputGenerator.beginFeature(self, interface, emit)
-        if self.featureName == 'VK_VERSION_1_0':
+        if self.featureName == 'VK_VERSION_1_0' or self.featureName == 'VK_VERSION_1_1':
             return
         nameElem = interface[0][1]
         name = nameElem.get('name')