Bump up to API 18 to match jbmr2.

Change-Id: I84755411b6688edc373a8fbd44af0dbc8e89d2ac
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 4d9313a..6d43bc0 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -173,6 +173,11 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS/*)
 
+# KLP now based off API 18.
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS/*)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************