Can you add those missing files to pkgsrc/pkgtools/x11-links/files/openwin and make clean in there again and try again?
I'm compiling kde, so can't disturb any packages until it's done.It looks like symlinks are created from a static file, wouldn't it be better to read /usr/openwin/lib for lib*.so* files and dynamically create symlinks to shared libraries at package build time?