x11-toolkits/open-motif*: Introduce open-motif-devel
Copy x11-toolkits/open-motif to x11-toolkits/open-motif-devel in order to
track development. Then update open-motif-devel to the latest motif-code
commit proxied through my GH account.
Register the conflict with x11-toolkits/open-motif.
Motif (formerly Open Motif) is developed by ics.com. The repository is
on Sourceforge. I proxy it through my github account to employ the GH
plumbing in ports.