make sure build.dir gets created as well.  Plus make sure we exclude the results of running Forrest (src/site/build) from the source packaging.
make sure build.dir gets created as well.  Plus make sure we exclude the results of running Forrest (src/site/build) from the source packaging.

git-svn-id: 4c5078813df38efa56971a28e09a55254294f104@489257 13f79535-47bb-0310-9956-ffa450edef68

apache/solr,apache/solr,apache/solr,apache/solr,apache/solr