Change eng builds from interpret-only to verify-at-runtime

Faster dex2oat -> faster boot after syncing core libraries.

Bug: 19762303
Change-Id: Ic266ed9c59829e0e18acc4adc103724cf480de7f
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 0883039..edf0179 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -344,6 +344,11 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/default.prop)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/recovery/root/default.prop)
 
+# Change from interpret-only to verify-at-runtime.
+$(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
 # ************************************************