[PATCH, d] Add README for process contributing to dmd and phobos

[Iain Buclaw]

On Thu, 10 Jan 2019 at 18:26, Joseph Myers <joseph@codesourcery.com> wrote:
>
> On Thu, 10 Jan 2019, Iain Buclaw wrote:
>
> > Hi,
> >
> > Joseph made mention that there isn't a readme documenting where
> > changes to d/dmd, libphobos/libdruntime, and libphobos/src should go.
> >
> > I hope this clears things up.  OK for trunk?
>
> This sort of patch is clearly covered by D maintainership.
>

OK. Thought it best to wait before committing, as the content is not
meant for myself to understand.

-- 
Iain