CleanSpec for 08d410f53249c18d752f56a881ed2335403080d4: Make libart the default runtime

Change-Id: Id632beeb2f96dd4502ac4a6c03bab5e4252137ff
diff --git a/CleanSpec.mk b/CleanSpec.mk
index c912497..f4f79cf 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -208,6 +208,9 @@
 # 4.4.1
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
+# Make libart the default runtime
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************