audio: Use kernel headers

Change-Id: I7a238b7c105d58eb6ec7794ec7a6af37f63c4cb0
diff --git a/post_proc/Android.mk b/post_proc/Android.mk
index 92731e3..6453e84 100644
--- a/post_proc/Android.mk
+++ b/post_proc/Android.mk
@@ -30,6 +30,9 @@
 	external/tinyalsa/include \
 	$(call include-path-for, audio-effects)
 
+LOCAL_C_INCLUDES += $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr/include
+LOCAL_ADDITIONAL_DEPENDENCIES := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr
+
 include $(BUILD_SHARED_LIBRARY)
 endif
 
@@ -60,6 +63,9 @@
 	$(call project-path-for,qcom-audio)/hal \
 	$(call include-path-for, audio-effects)
 
+LOCAL_C_INCLUDES += $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr/include
+LOCAL_ADDITIONAL_DEPENDENCIES := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr
+
 include $(BUILD_SHARED_LIBRARY)
 
 endif