HADOOP-12195. Add annotation to package-info.java file to workaround MCOMPILER-205.

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

@@ -686,6 +686,9 @@ Release 2.8.0 - UNRELEASED
 
     HADOOP-12193. Rename Touchz.java to Touch.java. (wang)
 
+    HADOOP-12195. Add annotation to package-info.java file to workaround
+    MCOMPILER-205. (wang)
+
   OPTIMIZATIONS
 
     HADOOP-11785. Reduce the number of listStatus operation in distcp

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/jmx/package-info.java

@@ -19,4 +19,7 @@
  * This package provides access to JMX primarily through the
  * {@link org.apache.hadoop.jmx.JMXJsonServlet} class.
  */
-package org.apache.hadoop.jmx;
+@InterfaceAudience.Private
+package org.apache.hadoop.jmx;
+
+import org.apache.hadoop.classification.InterfaceAudience;