Document fixcrlf as a filterreader in opposite direction. BZ 40976.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@475290 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/CoreTypes/filterchain.html

@@ -123,6 +123,7 @@ nested elements.<br>
 <a href="#deletecharacters">DeleteCharacters</a><br>
 <a href="#concatfilter">ConcatFilter</a><br>
 <a href="#tokenfilter">TokenFilter</a><br>
+<a href="../CoreTasks/fixcrlf.html">FixCRLF</a><br>
 
 <h3><a name="filterreader">FilterReader</a></h3>