webrtc-audio-processing: add license information

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/webrtc-audio-processing/webrtc-audio-processing.mk

@@ -8,6 +8,8 @@ WEBRTC_AUDIO_PROCESSING_VERSION = 0.1
 WEBRTC_AUDIO_PROCESSING_SOURCE = webrtc-audio-processing-$(WEBRTC_AUDIO_PROCESSING_VERSION).tar.xz
 WEBRTC_AUDIO_PROCESSING_SITE = http://freedesktop.org/software/pulseaudio/webrtc-audio-processing/
 WEBRTC_AUDIO_PROCESSING_INSTALL_STAGING = YES
+WEBRTC_AUDIO_PROCESSING_LICENSE = BSD-3c
+WEBRTC_AUDIO_PROCESSING_LICENSE_FILES = COPYING
 
 ifeq ($(BR2_SOFT_FLOAT),y)
 WEBRTC_AUDIO_PROCESSING_CONF_OPT += --with-ns-mode=fixed