[Pharo-project] Cog Unix/Cog MacOS now should not crash while running Pharo tests

.. of course it needs to be verified. Cog Mac Carbon [1] build past #10 and Cog Unix [2] build past #46 using latest Eliot's update. Note that built VMs are not MT-enabled (using a CoInterpreter class instead of CoInterpreterMT). (we should decide if we create new jobs on Hudson for MT-enabled VMs or just change existing ones to use new class). Please, go to Hudson, download and play with new VMs. Let me know if there's everything alright. [1] https://pharo-ic.lille.inria.fr/hudson/view/Cog/job/Cog%20Mac%20Carbon/ [2] https://pharo-ic.lille.inria.fr/hudson/job/Cog%20Unix/ -- Best regards, Igor Stasenko AKA sig.