Move from dalvik.vm.image-dex2oat-flags to dalvik.vm.dex2oat-filter [build]

This will allow us to conditionally change the compiler-filter based on other properties.

Bug: 15165413
Change-Id: Ie3f9292d35e9d4abf93271b7d22b72d185ee5ce2
diff --git a/CleanSpec.mk b/CleanSpec.mk
index fef406c..b3239d7 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -247,6 +247,12 @@
 
 # Switch host builds to Clang by default
 $(call add-clean-step, rm -rf $(OUT_DIR)/host)
+
+# Adding dalvik.vm.dex2oat-filter
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/default.prop)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/recovery/root/default.prop)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************