[swift-evolution] Add stableSort() to the standard library.

[Davide Italiano]

On Sun, Jan 10, 2016 at 9:39 PM, Adriano Ferreira
<adriano.ferreira at me.com> wrote:
> Perhaps instead of declaring new functions, just pass the `stability option` as a parameter to `sort` and `sortInPlace`. Makes sense?
>

It does. In fact, as you may see, I proposed that as 'alternative
considered'. I'm not completely sure about API/ABI stability
consequences, so I left that as an option.