Add prototype for slingstart launcher

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1626668 13f79535-47bb-0310-9956-ffa450edef68
Update svn:ignore property

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1626669 13f79535-47bb-0310-9956-ffa450edef68