[arch-ports] PPC office/aspell-*

It appears as though no dictionaries for aspell have been packaged for the PPC port. They should be very trivial (at least the en was by adding arch=(ppc)) to get working. Once I figure out how much time I'm going to have this semester. I may start putting this MacMini to good use. For now, I'll have to settle with just using ArchLinux on the PowerPC instead of helping the project.