hal: fix audio compilation for techpack.

Change-Id: Ifd3ddf97b7a642569bfbc99a00d48bc781590212
diff --git a/hal/Android.mk b/hal/Android.mk
index 8aa539c..7b6afe4 100644
--- a/hal/Android.mk
+++ b/hal/Android.mk
@@ -60,6 +60,7 @@
 LOCAL_SRC_FILES += audio_extn/audio_extn.c \
                    audio_extn/utils.c
 LOCAL_C_INCLUDES += $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr/include
+LOCAL_C_INCLUDES += $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr/techpack/audio/include
 LOCAL_ADDITIONAL_DEPENDENCIES += $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr
 LOCAL_CFLAGS += -DUSE_VENDOR_EXTN