Two tiny tidy ups for package.xml files...

Hi Lorenz,

I finally found time to work on the roslisp-related maintenance. For roslisp_repl I tried to catkin_make the package and stumbled over the following tiny issues.

Now, the package builds, but unfortunately rosrun'ning it yields an error during start-up of emacs. I'll open an issue for this in roslisp_repl.

Cheers,
Georg.