audio: Use kernel headers

Change-Id: I7a238b7c105d58eb6ec7794ec7a6af37f63c4cb0
diff --git a/post_proc/Android.mk b/post_proc/Android.mk
index 11d7461..f783758 100644
--- a/post_proc/Android.mk
+++ b/post_proc/Android.mk
@@ -32,6 +32,10 @@
 
 LOCAL_HEADER_LIBRARIES += libhardware_headers
 LOCAL_HEADER_LIBRARIES += libsystem_headers
+
+LOCAL_C_INCLUDES += $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr/include
+LOCAL_ADDITIONAL_DEPENDENCIES := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr
+
 include $(BUILD_SHARED_LIBRARY)
 endif
 
@@ -64,6 +68,10 @@
 
 LOCAL_HEADER_LIBRARIES += libhardware_headers
 LOCAL_HEADER_LIBRARIES += libsystem_headers
+
+LOCAL_C_INCLUDES += $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr/include
+LOCAL_ADDITIONAL_DEPENDENCIES := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr
+
 include $(BUILD_SHARED_LIBRARY)
 
 endif