[PATCH 2/5] Remove __need macros from stdio.h and wchar.h.

[Joseph Myers]

On Mon, 5 Jun 2017, Zack Weinberg wrote:

> wint_t is a little finicky because it might be defined by stddef.h, which
> belongs to the compiler.
> 
> In addition to the _types_, a bunch of other declarations shared between
> wctype.h and wchar.h are factored out to their own header.

This patch is OK.

-- 
Joseph S. Myers
joseph@codesourcery.com