Use gb_CppunitTest_use_confpreinit for LOK tiled rendering.

Now that we use the event loop for LOK we need to make sure that
it is able to run successfully first time, as unit tests start
with a completely clean config.

Change-Id: If9ddcb75fe8286381d71ecdc76ac7eb3697960d0

libreofficekit/CppunitTest_libreofficekit_tiledrendering.mk

@@ -29,7 +29,6 @@ $(eval $(call gb_CppunitTest_use_libraries,libreofficekit_tiledrendering, \
 	$(gb_UWINAPI) \
 ))
 
-
 # 	unotest \
 
 ifeq ($(OS),LINUX)
@@ -50,4 +49,6 @@ $(eval $(call gb_CppunitTest_use_rdb,libreofficekit_tiledrendering,services))
 
 $(eval $(call gb_CppunitTest_use_configuration,libreofficekit_tiledrendering))
 
+$(eval $(call gb_CppunitTest_use_confpreinit,libreofficekit_tiledrendering))
+
 # vim: set noet sw=4 ts=4: