[PATCH] restore CFString handling in attribute format (PR 88638)

[Mike Stump]

On Jan 4, 2019, at 2:03 PM, Martin Sebor <msebor@gmail.com> wrote:
> 
> The improved handling of attribute positional arguments added
> in r266195 introduced a regression on Darwin where attribute
> format with the CFString archetype accepts CFString* parameter
> types in positions where only char* would otherwise be allowed.

You didn't ask Ok?  I'll assume you want a review...  The darwin bits and the testsuite bits look fine.

That just leaves the C bits for someone...