cups-browsed upstart job does not load the apparmor profile for cups-browsed

On up to date trust I noticed that:
$ sudo aa-status
apparmor module is loaded.
124 profiles are loaded.
  ...
  /usr/sbin/cups-browsed
0 profiles are in complain mode.
32 processes have profiles defined.
31 processes are in enforce mode.
  ...
0 processes are in complain mode.
1 processes are unconfined but have a profile defined.
   /usr/sbin/cups-browsed (1222)

This means that while there is an apparmor profile for cups-browsed and it is loaded (good), it is being loaded into the kernel after /usr/sbin/cups-browsed is started which means that /usr/sbin/cups-browsed is running unconfined (bad).

Fix is to adjust the upstart job to either use /lib/init/apparmor-profile-load in the pre-start or to use the new apparmor stanza in the upstart job. Since cups itself is still using /lib/init/apparmor-profile-load, attached is a patch to use it for cups-browsed.