bug#22563: 25.0.90; etags missing support for attr_XXX and alias_method calls with parens

[Eli Zaretskii]

> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Fri, 05 Feb 2016 15:07:53 +0300
> 
> We already support:
> 
>     attr_reader :foo, :bar, # comment
>                 :qux
>     alias_method :foo, #cmmt
>                  :bar
> 
> This would add support for:
> 
>     attr_reader(:foo, :bar, # comment
>                 :qux)
>     alias_method(:foo, #cmmt
>                  :bar)

This is now fixed on the emacs-25 branch.