JikesRVM can't load certain classes e.g. GNU Classpath examples or its own Ant tasks

The examples that come with GNU Classpath are in subpackages of gnu.classpath.examples. They can't be run by JikesRVM because it blocks the prefix 'gnu.classpath' to just VM_BootClassLoader. Likewise, trying to build the RVM with itself fails because the Ant tasks are in org.jikesrvm.tools.ant, where org.jikesrvm is blocked. The attached patch gives a simple fix to this, but there is probably a better way (maybe autogenerating classes that should be from the bootloader during build?)