* Replace ELK_USE_{X11,MOTIF} with ELK_GUI, which is either "none" or is
some combination of "xaw" and/or "motif".
* Reenable Motif -- it seems to build properly with OpenMotif-2.0.x.
* Modernize this package a bit and clean up how linker flags are passed to
the build process by using the new variables available.
Regen the patches files (one file per patch).
Fix for NetBSD ELF platform: files/stab-elf.c and config/untested/elf-netbsd-cc
(by way of patches/patch-af) adjusted.
Thanks to Nick for the helping hand and to Alistair for the previous work.
This should close PR 13527.
Make X11 support conditional by way if the ELK_USE_X11 variable.
I tried to enable Motif support: only Motif 1.X should work but
even with the lesstif12 package it does not - it does compile though.
So Motif support if commented out but leaved in case someone want to fix
ELK.
