Integration of fixed point sub-functions - 3
[x] Porting functions in ism path. [x] acelp_core_dec top down MR (Part 1) [x] fixed version of masa_decode function included. [x] bw_switching_pre_proc function included.
[x] Porting functions in ism path. [x] acelp_core_dec top down MR (Part 1) [x] fixed version of masa_decode function included. [x] bw_switching_pre_proc function included.