Correct a pair of comment typos

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1572776 13f79535-47bb-0310-9956-ffa450edef68
Followup to r1570175
Update compilerSourceVM and compilerTargetVM values in jasper-howto.xml as well.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1572779 13f79535-47bb-0310-9956-ffa450edef68