[m-rev.] diff: make some bitwise tests' .exp files more readable

[Julien Fischer]

On Mon, 5 Dec 2022, Zoltan Somogyi wrote:

> This prepares for the addition of <<u and >>u.
>
> Note that bitwise_[u]int.m have .exp2 files as well, for 32 bit systems,
> which this diff does not update. Tomorrow, I will see whether my current
> setup has a 32-bit version of gcc I can use to force Mercury to pretend
> it is running on a 32 bit machine :-)

Or just use the java or csharp grades (which how those .exp2 files were
probably generated in the first place).

Julien.