SILK update with LBRR and some bugfixes

Makefile.am

interface/SKP_Silk_SDK_API.h

interface/SKP_Silk_control.h

interface/SKP_Silk_errors.h

interface/SKP_Silk_typedef.h

interface/SKP_debug.h

src_FIX/SKP_Silk_HP_variable_cutoff_FIX.c

src_FIX/SKP_Silk_LTP_analysis_filter_FIX.c

src_FIX/SKP_Silk_LTP_scale_ctrl_FIX.c

src_FIX/SKP_Silk_NLSF_MSVQ_encode_FIX.c

src_FIX/SKP_Silk_NLSF_VQ_rate_distortion_FIX.c

src_FIX/SKP_Silk_NLSF_VQ_sum_error_FIX.c

src_FIX/SKP_Silk_control_codec_FIX.c

src_FIX/SKP_Silk_corrMatrix_FIX.c

src_FIX/SKP_Silk_encode_frame_FIX.c

src_FIX/SKP_Silk_find_LPC_FIX.c

src_FIX/SKP_Silk_find_LTP_FIX.c

src_FIX/SKP_Silk_find_pitch_lags_FIX.c

src_FIX/SKP_Silk_find_pred_coefs_FIX.c

src_FIX/SKP_Silk_init_encoder_FIX.c