Remove portaudio include and librairy

libs/portaudio/Makefile.am

libs/portaudio/pa_asio/iasiothiscallresolver.h

libs/portaudio/pa_asio/pa_asio.h

libs/portaudio/pa_common/pa_allocation.c

libs/portaudio/pa_common/pa_allocation.h

libs/portaudio/pa_common/pa_converters.c

libs/portaudio/pa_common/pa_converters.h

libs/portaudio/pa_common/pa_cpuload.c

libs/portaudio/pa_common/pa_cpuload.h

libs/portaudio/pa_common/pa_dither.c

libs/portaudio/pa_common/pa_dither.h

libs/portaudio/pa_common/pa_endianness.h

libs/portaudio/pa_common/pa_front.c

libs/portaudio/pa_common/pa_hostapi.h

libs/portaudio/pa_common/pa_process.c

libs/portaudio/pa_common/pa_process.h

libs/portaudio/pa_common/pa_skeleton.c

libs/portaudio/pa_common/pa_stream.c

libs/portaudio/pa_common/pa_stream.h

libs/portaudio/pa_common/pa_trace.c