Set FUSEKI_BASE (in case FUSEKI_HOME set elsewhere)

git-svn-id: https://svn.apache.org/repos/asf/jena/branches/jena-fuseki-new-ui@1582751 13f79535-47bb-0310-9956-ffa450edef68
Minor

git-svn-id: https://svn.apache.org/repos/asf/jena/branches/jena-fuseki-new-ui@1582752 13f79535-47bb-0310-9956-ffa450edef68