gen-jar-with-deps.sh: add TODO to include sources
gen-jar-with-deps.sh: add TODO to include sources

I didn't know how to do it before, but it is actually pretty
straightforward. However, it is not urgent to change over to the
"best practices" approach since the script works as is.

TehSAUCE/imagej,biovoxxel/imagej,biovoxxel/imagej,biovoxxel/imagej,TehSAUCE/imagej,TehSAUCE/imagej