Document GNU Classpath dependencies on Fedora 17

GNU Classpath 0.99 does not appear to require either FastJar or PCCTS.

Signed-off-by: Jussi Virtanen <jussi.k.virtanen@gmail.com>
Merge pull request #33 from jvirtanen/fixes/gnu-classpath-deps-on-fedora-17

Document GNU Classpath dependencies on Fedora 17