HADOOP-8924. Add CHANGES.txt description missed in commit r1435380.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1436181 13f79535-47bb-0310-9956-ffa450edef68

Author: Suresh Srinivas

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

@@ -146,6 +146,9 @@ Trunk (Unreleased)
     HADOOP-9162. Add utility to check native library availability.
     (Binglin Chang via suresh)
 
+    HADOOP-8924. Add maven plugin alternative to shell script to save
+    package-info.java. (Chris Nauroth via suresh)
+
   BUG FIXES
 
     HADOOP-8419. Fixed GzipCode NPE reset for IBM JDK. (Yu Li via eyang)