[Cooker] Sound devices perms

[St�phane Genaud]

After an update of 8.0 to 8.1 beta 3 :

[bash #] ls -l /dev/sound/{dsp,mixer}
crw-rw----    1 root     audio     14,   3 sep 10 14:03 /dev/sound/dsp
crw-rw----    1 root     audio     14,   0 sep 10 14:03 /dev/sound/mixer

and xmms (for instance) complains for a normal user when he tries
to play something.
There should be rw perms for others as well.

-- 
  St�phane Genaud                                    
   ICPS-LSIIT, Universit� Louis Pasteur                   
   P�le API, Bd. S. Brant, F-67400 Illkirch        
   tel : (33)(0)390244542, 0619058113 (SFR)