minor build.xml cleanup http://codereview.appspot.com/5006041
minor build.xml cleanup
http://codereview.appspot.com/5006041

1. "ant -p" prints all targets with descriptions.  I removed
descriptions from internal targets, moving the info to comments.

2. I removed some target dependencies that are implied by transitive
dependencies.  This is mostly just to simplify the dependency diagram
so I have a better idea how to simplify build.xml further.

R=jasvir@gmail.com


git-svn-id: eb21526166532bd3afc2c1499c0cf105ce815f5a@4619 360991c0-9f3b-0410-ba87-8b362a00edf4

jasvir/caja,googlearchive/caja,cepm-nate/caja,cepm-nate/caja,initaldk/caja,initaldk/caja,wishabi/caja-1,cepm-nate/caja,wishabi/caja-1,wishabi/caja-1,jasvir/caja,googlearchive/caja,googlearchive/caja,initaldk/caja,jasvir/caja,jasvir/caja,googlearchive/caja,initaldk/caja,cepm-nate/caja,cepm-nate/caja,initaldk/caja,wishabi/caja-1,googlearchive/caja,initaldk/caja,jasvir/caja,wishabi/caja-1,cepm-nate/caja,jasvir/caja,wishabi/caja-1,googlearchive/caja