fix CleanSpec for BOARD_FRAMEBUFFER_FORCE_FORMAT removal

Change-Id: Iffdccc044c493098703b11888df8ee5f9a43ccc0
Signed-off-by: Erik Gilling <konkers@android.com>
diff --git a/CleanSpec.mk b/CleanSpec.mk
index f7e3e43..e471a64 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -48,3 +48,4 @@
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libsurfaceflinger_intermediates)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libui_intermediates)
\ No newline at end of file