[Syntax] Add #selector and #keyPath tokens

Author: harlanhaskins

utils/gyb_syntax_support/Token.py

@@ -108,6 +108,10 @@ def __init__(self, name, text):
           is_keyword=True),
     Token('PoundFunction', 'pound_function', text='#function',
           is_keyword=True),
+    Token('PoundSelector', 'pound_selector', text='#selector',
+          is_keyword=True),
+    Token('PoundKeyPath', 'pound_keyPath', text='#keyPath',
+          is_keyword=True),
     Token('Arrow', 'arrow', text='->'),
     Token('AtSign', 'at_sign', text='@'),
     Token('Colon', 'colon', text=':'),