updating update.xml

git-svn-id: http://dev.eclipse.org/svnroot/technology/org.eclipse.stem/trunk/data@2665 92a21009-5b66-0410-b83a-dc787c41c6e9
tree: b2843977728f38f07f6df6ab480c42e0ef801291
  1. geography/
  2. org.eclipse.stem.internal.data/
  3. population/