[Bug c/65455] typeof _Atomic fails

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65455

--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
(_Generic does make sure to treat its controlling expression as an rvalue, 
removing qualifiers including _Atomic as well as ensuring GCC's internal 
representation of _Noreturn as a qualifier does not affect the type 
resulting for expressions such as &abort.)