r220177 - [modules] Add support for #include_next.

[Joerg Sonnenberger]

On Mon, Oct 20, 2014 at 02:51:04PM -0700, Richard Smith wrote:
> 1) Partial revert of r214119 to not use these __UINT_* macros (that is, we
> decide that we only have them for GCC compatibility), or
> 2) Remove MSVCCompat checks from r211657 (that is, we decide that the
> macros are a guaranteed part of Clang's interface too), or
> 3) Provide the macros in MSVCCompat mode only if we're freestanding.

Unless there is a good reason to, I would go with (2).

Joerg