I wonder where you got your source from, because keybinder plugin is in svn and 8.02 source.
You find it in "src/plugins/contrib/keybinder/".
If you build with "./configure;make ..." you can activate it by running "./configure --with-contrib-plugins=keybinder", but I would recommend to build all contrib-plugins, so you should use "all" instead of "keybinder".
If you build C::B with C::B you should also build "ConribPlugins-unix.workspace" or at least the "keybinder"-project included in this workspace.