[m-rev.] for review: read Mercury files using read_file_as_string

[Julien Fischer]

On Mon, 29 Jul 2019, Zoltan Somogyi wrote:

> Attached is the proposed diff, for review by Peter (the Erlang part) and Julien
> (everything else).

That looks fine.  Regarding the XXX in the Java foreign_proc, yes,
length() is the correct method to call.

Julien.