[arch-dev-public] Adding silly to extra

Hi, I would like to add silly to extra (it's currently in unsupported). To make smc work on x86_64, the cegui package will need to be rebuilt with the silly image codec enabled. That will close FS#8469. Any objections? Thanks, Eric -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.