[m-rev.] for review: put .module_dep and .prof files into grade-specific subdirs

[Julien Fischer]

Hi Zoltan,

On Fri, 2 Aug 2024 at 20:54, Zoltan Somogyi <zoltan.somogyi at runbox.com> wrote:
>
> For review by anyone.
>
> I don't think this requires an entry in NEWS.md, but could be persuaded
> otherwise.

.prof files are publicly documented in mprof's usage message, namely:

Arguments:
        If no <files> are specified, then the `--use-dynamic' option
        is implied: the call graph will be built dynamically.
        Otherwise, the <files> specified should be the `.prof' file
        for every module in the program. The `.prof' files, which are
        generated automatically by the Mercury compiler, contain the
        program's static call graph.

(BTW: this information does not appear in the users' guide.)

On that basis, I think a brief entry in the NEWS file describing where
.prof files
will now be placed is worthwhile.

The diff itself is fine.

Julien.