[m-rev.] for review: making pointer_equal a builtin

[Julien Fischer]

Hi Zoltan,

On Thu, 27 Nov 2014, Zoltan Somogyi wrote:

> Would anyone object if I committed this diff without those
> bootchecks?

No, go ahead and commit.

> I think the implementations of the new builtin
> for the Java, C# and Erlang backends are simple enough
> that the chances of a bug are not that high, and if they
> do arise, the workaround is dead simple (just comment out
> the few lines of builtin_ops.m that recognize the builtin).

The Java, C# and Erlang grades are installed as part of the testing I do
for the ROTD builds.  If anthing is broken, I will probably notice it
tomorrow (or whenever an rotd is next built).

Cheers,
Julien.