Change PLATFORM_VERSION from NYC to N

But won't someone think of the cheesecake?

Bug: 25558821
Change-Id: Icf0adcb5b429a517fdbddb0d137d396a2d168c7c
diff --git a/CleanSpec.mk b/CleanSpec.mk
index a7c91b4..9cab929 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -366,6 +366,11 @@
 
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
+# Change PLATFORM_VERSION from NYC to N
+$(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
 # ************************************************