Update the cleanspec to clean libwebcore.

Change-Id: Ie27e0e1c8a617199f1d8ff0b484936ccd14b04de
diff --git a/cleanspec.mk b/cleanspec.mk
index de22378..cd2ce0d 100644
--- a/cleanspec.mk
+++ b/cleanspec.mk
@@ -79,6 +79,8 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/bin/bugreport)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libwebcore_intermediates)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/STATIC_LIBRARIES/libwebcore_intermediates)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/STATIC_LIBRARIES/libwebcore_intermediates)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libwebcore_intermediates)
 
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST