Adding section for 0.15 branch.

git-svn-id: https://svn.apache.org/repos/asf/lucene/hadoop/trunk@584334 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -3,6 +3,9 @@ Hadoop Change Log
 
 Trunk (unreleased changes)
 
+
+Branch 0.15 (unreleased changes)
+
   INCOMPATIBLE CHANGES
 
     HADOOP-1708.  Make files appear in namespace as soon as they are