FreeSWITCH-FS-6836

Merge pull request #994 in FS/freeswitch from ~DRAGOS_OANCEA/freeswitch-dragos:fix_amrwb_mode-set_fmtp to master

* commit 'a88332ebfa89adc45949fe5fd1055ffef68b3989':
  FS-9614: mod_amrwb: fix AMR-WB mode bitmap ("mode-set" in fmtp)