Add AppArmor 2.9

The 2.9 series brings features such as support for dbus, unix
abstract sockets, ptrace mediation, and replaces Perl tools
with equivalents implemented in Python. See [1] for details.

The package expression has been changed to build each component
(library, parser) separately. Additionally, Perl is now only
used to build man pages and locale support has been removed.

The user-land tools are currently broken (fail to import the Python module),
but this isn't really a regression, as only two or three of the tools
installed by the previous version were functional. The most important
tool, aa-status, works, however.

Lastly, dbus support is compiled in, but is untested and probably
requires patching of dbus.

[1]: http://wiki.apparmor.net/index.php/ReleaseNotes_2_9_0