Comment 4 for bug 745120

10.04 will not be receiving any more updates but 12.04 and 14.04 are valid targets. For those releases I have not conducted tests but the man pages [1,2] are clear enough to confirm this bug:

===
   Globbing
       File resources may be specified with a globbing syntax similar to that
       used by popular shells, such as csh(1), bash(1), zsh(1).

       * can substitute for any number of characters, excepting '/'

       ** can substitute for any number of characters, including '/'

      .
      .
      .
      .

       /tmp/**
           Files and directories anywhere underneath /tmp.
===

[1]: http://manpages.ubuntu.com/manpages/precise/en/man5/apparmor.d.5.html
[2]: http://manpages.ubuntu.com/manpages/trusty/en/man5/apparmor.d.5.html