help, about build cyanogenmod11 source code

help.

I build cm11 source code for xiaomi-mione_plus, this error:
hardware/qcom/audio-caf/legacy/mm-audio/aenc-amrnb/qdsp6/inc/omx_amr_aenc.h:53:34: fatal error: QOMX_AudioExtensions.h: No such file or directory
compilation terminated.

I add the file"QOMX_AudioExtensions.h"in to …/inc directory, but, this error will appear. What should i do?