Fix Eclipse not finding bcprov.jar

Commit 08da52a45633704c1486a6a92d536713c80e4bce changed
the Ant builder to consume "lib/bcprov-jdk15on-151.jar"
instead of "lib/bcprov.jar". Unfortunately, it did not update the
Eclipse project configuration to reflect that change.

This commit fixes that.
I thought some more about this and while you're right about this being wrong, I don't think the suggested fix is enough: The Ant build script use junit4.jar from lib/ folder of the fred repository. Using it from /usr/share in this Eclipse classpath file would make the stuff non-coherent. Eclipse and Ant should use the *same* junit4.jar.
So this ought to be fixed to use the one from the lib/ directory.
BUT: The recent change of making the Ant builder require hamcrest and junit4 in lib/ sucks anyway IMHO. They should first try to use them from the system directories such as /usr/lib before the user has to manually copy them somewhere. 
I think I recently tried to figure out how to do that, but gave up due to lack of understanding of the fred Ant script.
Can you tell me how to make everything us the /usr/share version both of JUnit and hamcrest as well maybe? If its less work for you to just a file pull request to fix this yourself, I would be OK with that. If you want me to do the whole of it, tell me.