Improve changelog entry of r1624223.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1624241 13f79535-47bb-0310-9956-ffa450edef68
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=43001
Enable the JspC Ant taks to set the JspC option mappedFile

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1624249 13f79535-47bb-0310-9956-ffa450edef68