and others are relative paths. This change checks to see if the path has
already been appended to ${basedir}. If not, it prepends basedir. JXRBean
now expects something that will slot directly into new File(path).
git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@112968 13f79535-47bb-0310-9956-ffa450edef68