File _aggregate of Package aggregate

<aggregatelist>
  <aggregate project="home:pbek:QOwnNotes">
    <package>desktop</package>
  </aggregate>
  <aggregate project="graphics">
    <package>oxipng</package>
  </aggregate> 
  <aggregate project="Publishing">
    <package>texworks</package>
    <package>mupdf</package>
      <repository target="15.6" source="15.6"/>
      <repository target="16.0" source="15.6"/>
  </aggregate> 
</aggregatelist>