[Vm-dev] Stdin/stdout/stderr support

[Bert Freudenberg]

I have implemented direct support for std streams:

http://squeakvm.org/svn/squeak/branches/olpc/platforms/Cross/plugins/FilePlugin/sqFilePluginBasicPrims.c

This will catch filenames like "/dev/stderr" and connect the real  
stderr instead (also preventing to close these).

This file pattern is in usage already, e.g.

http://lists.squeakfoundation.org/pipermail/beginners/2007-April/002268.html

In OLPC we used this to log errors (we added FileStream class>>stderr  
etc.) because SqueakDebug.log is in an unaccessible place, but using  
the /dev/stderr symlink is broken by the security architecture, so I  
need to access the actual stderr.

Any objections to make this go into the trunk Cross platform dir?

- Bert -