[GCC-XML]Function attributes.

[Brad King]

Oscar,

> >> There is a missing feature, though: it's interesting to know some
> >> attributes for functions
> >
> > I've just added the support for this.
> [snip]
>
> Thank you very much, Brad.

No problem.  Actually, after some more thought, I've modified the dump to
dump only one attribute that contains both lists.  Instead of separate
decl_attributes and type_attributes, there is now just something like
this:

  attributes="dllexport __stdcall__"

This should simplify parsing.

-Brad