[libcxx] r249738 - Split <ctype.h> out of <cctype>.

[Adrian Prantl via cfe-commits]

> On Mar 11, 2016, at 4:11 PM, Duncan P. N. Exon Smith <dexonsmith at apple.com> wrote:
> 
> Did anyone file a PR for this?
> 

I filed PR 26928 - Prune the include path for modules 
https://llvm.org/bugs/show_bug.cgi?id=26928
as a starting point.

-- adrian