LUCENE-4877: fix CHANGES entry to be under 4.3

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1465227 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4675: Improve PostingsHighlighter integration

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1465228 13f79535-47bb-0310-9956-ffa450edef68