Added webrtc audio processing library

Change-Id: I75318958e990664d7227add13e48e1f8556364c8
diff --git a/target/product/core.mk b/target/product/core.mk
index 01903c6..a451803 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -95,7 +95,8 @@
     ip \
     screencap \
     sensorservice \
-    libspeexresampler
+    libspeexresampler \
+    libwebrtc_audio_preprocessing
 
 # host-only dependencies
 ifeq ($(WITH_HOST_DALVIK),true)