Missing 64 bit packages

[Andrew Schulman]

>   pinfo
>   ping

I use these, so I may adopt them if no one else does.
 
> Andrew Schulman
> 
>   lablgtk2
>   lftp
>   orpie
>   ploticus
>   sng
>   unison

I'm not sure if lablgtk2 or ploticus are worth the effort any more, but
I'll look at them again.

lftp won't build in x86_64 and I haven't found the solution yet.

The rest have missing dependencies (rgb and ocaml).