Fixed the outdated binaries generation pipeline

Now the first two tutorials for roslisp should work perfectly, especially the [Organizing Files](http://wiki.ros.org/roslisp/Tutorials/OrganizingFiles) one
> let the user pass the target name explicitly (from experience with many other functions it is usually a bad idea to hide that from the user)

You mean the CMake target name or just the executable name? The executable name is the ```_output``` argument. If the user will have to specify the CMake target name he'll have to know what is a target and most people wouldn't be bothered learning about CMake that much. Maybe we could add an extra argument that would have the old value as a default...