[m-rev.] diff: break up add_pragma and make_hlds_passes

[Zoltan Somogyi]

On Tue, 27 Jan 2015 12:17:07 +1100 (AEDT), Julien Fischer <jfischer at opturion.com> wrote:
>     Making Mercury/opts/pqueue.opt
>     Making Mercury/opts/pretty_printer.opt
>     pretty_printer.m:878: In predicate `set_io_pp_params'/3:
>     pretty_printer.m:878:   warning: unnecessary `promise_pure' pragma.
>     For more information, recompile with `-E'.
>     ** Error making `Mercury/opts/pretty_printer.opt'.

I just disabled this warning for mutable access predicates until
I fix the root cause.

Zoltan.