[Patch] libc++: Add a default rune table

[Joerg Sonnenberger]

On Thu, Dec 11, 2014 at 02:27:39PM +0100, Chandler Carruth wrote:
> Generally speaking, I am strongly in favor of libc++ isolating its
> functionality from features which are so varying in quality from system to
> system as locales. Where it is reasonable from a maintenance and support
> perspective, I would much rather than libc++ simple implement and provide
> the desired behavior from first principles.

Sane system use the same logic for the default C locale and the
non-default locales, just with a different table. As such, I don't
believe this change really delivers on the isolation aspect.

Joerg