[m-rev.] for post-commit review: specialize one fold, move two

[Peter Wang]

On Thu, 01 Dec 2022 16:11:54 +1100 "Zoltan Somogyi" <zoltan.somogyi at runbox.com> wrote:
> Move foldl3_* predicates out of make.build.m.
> 
> compiler/make.track_flags.m:
>     Move foldl3_maybe_stop_at_error_sn here, since it is only used here,
>     along with a copy of foldl3_maybe_stop_at_error_loop, then
> 
>     - inline it at its only call site, and
>     - delete the now-unused predicate.
> 
>     Simplify the local copy of foldl3_maybe_stop_at_error_loop
>     by specializing it to its only set of top level arguments,
>     and rename it after its now-singular purpose.
> 
> compiler/make.dependencies.m:
>     Move foldl3_maybe_stop_at_error_{mi,fi} here, together with
>     foldl3_maybe_stop_at_error_loop, and the type and inst it uses,
>     since they are only called from here. There are not any changes
>     in the code moved here (yet).
> 
> compiler/make.build.m:
>     Delete the moved code.

That's fine.

Peter