add CHANGES.txt description for HADOOP-9646. (Colin Patrick McCabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493245 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -372,6 +372,9 @@ Release 2.1.0-beta - UNRELEASED
 
     HADOOP-9630. [RPC v9] Remove IpcSerializationType. (Junping Du via llu)
 
+    HADOOP-9646. Inconsistent exception specifications in FileUtils#chmod
+    (Colin Patrick McCabe)
+
   NEW FEATURES
 
     HADOOP-9283. Add support for running the Hadoop client on AIX. (atm)