cassandra doesn't build on jdk 9

Build fails with

Unable to load a script engine manager (org.apache.bsf.BSFManager or javax.script.ScriptEngineManager)

Adding jars bsf.jar, commons-logging.jar and rhino.jar to the ant class path (~/.ant/lib) fixes the problem, however because there are <script> and <scriptdef> tags at the top most level in the build.xml, these jars can't be loaded as part of the build, and work.

There is this: http://bugs.java.com/bugdatabase/view_bug.do?bug_id=8152533