fix javadoc wanring introduced by HADOOP-3073

git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/trunk@642090 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/hadoop/net/SocketInputStream.java

@@ -22,6 +22,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.net.Socket;
 import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
 import java.nio.channels.ReadableByteChannel;
 import java.nio.channels.SelectableChannel;
 import java.nio.channels.SelectionKey;

src/java/org/apache/hadoop/net/SocketOutputStream.java

@@ -22,6 +22,7 @@ import java.io.IOException;
 import java.io.OutputStream;
 import java.net.Socket;
 import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
 import java.nio.channels.SelectableChannel;
 import java.nio.channels.SelectionKey;
 import java.nio.channels.WritableByteChannel;