[Etoys] Updating to latest sugar

[Bert Freudenberg]

If you are running one of the olpc developer builds, you can update  
to the latest Sugar using yum:

yum update sugar olpc-artwork olpc-librsvg2 matchbox-window-manager

This avoids having to download and flash a completely new build. I'm  
running build91 (the latest stable) from internal flash, which is  
much more reliable than booting from USB on the A-test board.

- Bert -