src/assembly/site-component.xml

<assembly>
  <id>site-component</id>
  <formats>
    <format>jar</format>
  </formats>
  <fileSets>
    <fileSet>
      <directory>${basedir}</directory>
      <outputDirectory>jetty-xml</outputDirectory>
      <includes>
        <include>src/main/resources/org/eclipse/**</include>
      </includes>
    </fileSet>
  </fileSets>
</assembly>