r220177 - [modules] Add support for #include_next.

[JF Bastien]

r211657 made it easier to support newlib, makes the interface clang
provides more uniform (there are already similar macros), and more
compatible with GCC. I'd argue they're standard macros because of their
naming :-)

On Mon, Oct 20, 2014 at 4:03 PM, Joerg Sonnenberger <joerg at britannica.bec.de
> wrote:

> On Mon, Oct 20, 2014 at 07:02:01PM -0400, Aaron Ballman wrote:
> > I have a very slight preference for (1) over (2) -- I don't see the
> > benefit to guaranteeing those nonstandard macros as being part of
> > Clang's interface.
>
> Supporting char vs unsigned char gets messy without out.
>
> Joerg
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