DERBY-6685: Permission problems when running JUnit tests with Ant 1.9.4

Grant write permission to ant.jar so that test results can be written
to a file.

git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1616111 13f79535-47bb-0310-9956-ffa450edef68
DERBY-2234: ant junitreport gives fatal error during transformation

Use Ant's replace functionality to insert the sysinfo link into
overview-frame.html, instead of using an XSLT script. The XSLT script
only works if overview-frame.html is a valid XML document, which is
not the case without some massaging.

git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1616112 13f79535-47bb-0310-9956-ffa450edef68