update releasenotes to catch last two commits

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20@1063166 13f79535-47bb-0310-9956-ffa450edef68

src/docs/releasenotes.html

@@ -27,7 +27,9 @@
 <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-6760'>HADOOP-6760</a>] - WebServer shouldn't increase port number in case of negative port setting caused by Jetty's race</li>
 <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-6833'>HADOOP-6833</a>] - IPC leaks call parameters when exceptions thrown</li>
 <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-6881'>HADOOP-6881</a>] - The efficient comparators aren't always used except for BytesWritable and Text</li>
+<li>[<a href='https://issues.apache.org/jira/browse/HADOOP-6923'>HADOOP-6923</a>] - Native Libraries do not load if a different platform signature is returned from org.apache.hadoop.util.PlatformName</li>
 <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-6928'>HADOOP-6928</a>] - Fix BooleanWritable comparator in 0.20</li>
+<li>[<a href='https://issues.apache.org/jira/browse/HADOOP-7116'>HADOOP-7116</a>] - raise contrib junit test jvm memory size to 512mb</li>
 <li>[<a href='https://issues.apache.org/jira/browse/HDFS-15'>HDFS-15</a>] - Rack replication policy can be violated for over replicated blocks </li>
 <li>[<a href='https://issues.apache.org/jira/browse/HDFS-132'>HDFS-132</a>] - With this incompatible change, under metrics context "dfs", the record name "FSDirectory" is no longer available. The metrics "files_deleted" from the deleted record "FSDirectory" is now available in metrics context "dfs", record name "namenode" with the metrics name "FilesDeleted".
 </li>