- Renamed msg structure in ITTI to ittiMsg to avoid confusions when parsing XML file if multiple structure "msg" are defined
- Fix build issue of EPC
- Enable event fd for EPC instead of pthread_cond
- Added some new S1AP messages defintions


git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4506 818b1a75-f10b-46b9-bf7c-635c3b92a50f