YARN-1704. Modified LICENSE and NOTICE files to reflect newly used levelDB related libraries. Contributed by Billie Rinaldi.
svn merge --ignore-ancestry -c 1573702 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1573705 13f79535-47bb-0310-9956-ffa450edef68