switch to use mod_voipcodecs and pull old mod_g722, mod_g726, mod_gsm (mod_g711 should not be used now unless your not using mod_voipcodecs)

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7664 d0543943-73ff-0310-b7d9-9358b9ac24b2