LargeIntegersPlugin 32bit-64bit updates with unit test

>
> I can now vouch for the following plugins as 32/64 bit clean on unix  
> VMs:
>
> - BalloonEnginePlugin
> - BitBltSimulation
> - FilePlugin
> - SocketPlugin
> - LargeIntegersPlugin
> - OSProcessPlugin
> - AioPlugin
> - XDisplayControlPlugin
> - AsynchFilePlugin
> - FileCopyPlugin

>  
>
>
> ------------------------------------------------------------------------
>
> Attached is a set of unit tests for LargeIntegersPlugin. These tests
> should pass on any combination of 32 or 64 bit image and virtual machine.
>
> For a 64 bit image, the patches on Mantis 5238 (http://bugs.squeak.org/view.php?id=5238)
> must be applied. After applying those patches, the LargeIntegersPluginTests must
> be recompiled so that large integer literals are correctly compiled in the unit
> tests. Any other methods in the image with large integer literals must also be
> recompiled.
>
> No changes to the LargeIntegersPlugin are required whatsoever.
>
> With the Mantis 5238 patches, the plugin works for all combinations of
> 32 and 64 bit image and virtual machine, and passes all tests.
>
> On a 64 bit VM and 64 bit image without the plugin:
>   Time millisecondsToRun: [2000 factorial] ==> 3334
>
> On a 64 bit VM and 64 bit image with the LargeIntegerPlugin:
>   Time millisecondsToRun: [2000 factorial] ==> 51
>
> On a 64 bit VM and 32 bit image without the plugin:
>   Time millisecondsToRun: [2000 factorial] ==> 3454
>
> On a 64 bit VM and 32 bit image with the LargeIntegerPlugin:
>   Time millisecondsToRun: [2000 factorial] ==> 59
>
> I can now vouch for the following plugins as 32/64 bit clean on unix VMs:
>
> - BalloonEnginePlugin
> - BitBltSimulation
> - FilePlugin
> - SocketPlugin
> - LargeIntegersPlugin
> - OSProcessPlugin
> - AioPlugin
> - XDisplayControlPlugin
> - AsynchFilePlugin
> - FileCopyPlugin
>
> Dave
>