Actually fix build breakage with cleanspec. am: 319b8292be am: b16a4d26d3
am: 6ad2f6c984

Change-Id: I09a208dcd24cf17d3171ed5d4f64282a2642dd56
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 11846f6..c557635 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -53,3 +53,4 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib64/hw/android.hardware.bluetooth*)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/etc/init/android.hardware.bluetooth*)
 $(call add-clean-step, rm -rf $(OUT)/soong/.intermediates/)
+$(call add-clean-step, rm -rf $(OUT_DIR)/soong/.intermediates/hardware/interfaces/)