libnotify is already in JDS so it's not needed to compile it itself. So libnotify.spec file can be optional.
Actually on latest builds (sxce 60 + vermillion 62 build) libnotify.spec won't build because other package (SUNWgnome-panel) owns its output files (/usr/bin/notify-send /usr/lib/libnotify.so /usr/lib/libnotify.so.1). Have nice time, Petr Sobotka aka Pietro_S
