Merge -r 699427:699428 from trunk to 0.18 branch. Fixes: HADOOP-2421.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/branches/branch-0.18@699431 13f79535-47bb-0310-9956-ffa450edef68

build.xml

@@ -838,7 +838,7 @@
          <param name="-oldapidir" value="${jdiff.xml.dir}"/>
          <param name="-newapidir" value="${jdiff.xml.dir}"/>
          <param name="-javadocold" value="${jdiff.stable.javadoc}"/>
-         <param name="-javadocnew" value="${build.javadoc}/"/>
+         <param name="-javadocnew" value="../../api/"/>
          <param name="-stats"/>
        </doclet>
        <classpath >