Fix extensions/build.xml
<ant dir="pc-axis/" target="build" />
<ant dir="database/" target="build" />
<ant dir="wikidata/" target="build" />
- <ant dir="rdf-extension/" target="build" />
</target>
<target name="clean">
<ant dir="pc-axis/" target="clean" />
<ant dir="database/" target="clean" />
<ant dir="wikidata/" target="clean" />
- <ant dir="rdf-extension/" target="clean" />
</target>
<target name="test">
