[racket] Ubuntu ppa update

I think there should be a dependency for libjpeg2:

On Fri, Jul 20, 2012 at 07:19:22PM -0400, Danny Heap wrote:
> I installed racket in Ubuntu 12.04, first using aptitude (5.1.3), then
> downloading directly from racket-lang.org and running the installation
> script.  In both cases I got this message: 
> 
> heap at heap-ThinkPad-X61-Tablet:~/Downloads$ drracket
> ffi-lib: couldn't open "libjpeg.so.62" (libjpeg.so.62: cannot open shared object file: No such file or directory)
> 
> ... after invoking drracket
> 
> The second time around, I installed the libjpeg62 package, and now things
> seem to work.  Perhaps there's a dependency problem with the racket
> package.


-- 
Danny Heap
BA4270			416-978-5899
heap at cs.utoronto.ca	http://www.cs.utoronto.ca/~heap