Added a new helper function mpf_rtp_termination_descriptor_alloc().
Added a new helper function mpf_rtp_termination_descriptor_alloc().

AaronZhangL/unimrcp-1,AaronZhangL/unimrcp-1,unispeech/unimrcp,unispeech/unimrcp,AaronZhangL/unimrcp-1,unispeech/unimrcp