DERBY-6683: Add vti demo classes to the bin.tar.gz distribution just as they are added to the bin.zip distribution; commit derby-6683-01-aa-addVTIdemoClassesToTargzDistro.diff.

git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1615565 13f79535-47bb-0310-9956-ffa450edef68