Clean frameworks after replacing IDropBox.aidl with

IDropBoxService.aidl, which causes some build confusion
with dependencies and Parcelables and so on.

(Will be checked in immediately after the change in question)

cleanspec.mk

@@ -103,6 +103,7 @@ $(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 $(PRODUCT_OUT)/system/build.prop)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates)
 
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST