Fix incremental builds.

Add a cleanspec step.

Change-Id: I449fb89334e73037087865e886d7108e7f60ffce
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 0de72f5..0d5590d 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -173,6 +173,7 @@
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework-base_intermediates/src/packages/services/Proxy/)
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework-base_intermediates/src/core/java/android/print/IPrinterDiscoverySessionObserver.*)
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework-base_intermediates/src/core/java/android/print/IPrinterDiscoverySessionClient.*)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework-base_intermediates/src/core/java/android/os/IBattery*)
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************