Update lang/ruby-devel to the latest 1.8 snapshot as of 2003-01-11,
which now supports FreeBSD/sparc64.
Set ONLY_FOR_ARCHS to i386, alpha and sparc64. Ruby does not support
IA64 yet. It does not even build or install correctly. We need some
clue to the IA64 stack structure and handling of the IA64 register