eclipse-iplog: Add new consumes element to IP log

This element documents other Eclipse projects that are consumed by
this project.  JGit doesn't consume any projects, but its sister
project EGit does.

Change-Id: Ie922d27c580f6742e2acb051815a381af48df7ca
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>