Update version name to 2.1 and API to 7.

Change-Id: If922a88c1f3e99553ec5df9b870713eab1c53c54
diff --git a/cleanspec.mk b/cleanspec.mk
index 606775f..5bf4278 100644
--- a/cleanspec.mk
+++ b/cleanspec.mk
@@ -101,6 +101,10 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app)
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST