Fix clean-up of gb_UIConfig_get_a11yerrors_target

The old code tried to remove non-exisiting *.a11yerrors files corresponding to a
UIConfig's individual *.ui files, not the one single *.a11yerrors file
corresponding to the UIConfig itself.

Also, there's no need to have a UIA11YErrorsTarget merely for clean-up.  Just
do that clean-up as part of gb_UIConfig_get_clean_target.

Change-Id: I6676f08496254398801bb75172c1326d1c843071
Reviewed-on: https://gerrit.libreoffice.org/50156Reviewed-by: Samuel Thibault <sthibault@hypra.fr>
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

solenv/gbuild/TargetLocations.mk

@@ -281,7 +281,6 @@ $(eval $(call gb_Helper_make_clean_targets,\
 	CppunitTestFakeExecutable \
 	CustomTarget \
 	ExternalProject \
-	UIA11YErrorsTarget \
 	UIConfig \
 	UIImageListTarget \
 	UIMenubarTarget \

solenv/gbuild/UIConfig.mk

@@ -117,6 +117,8 @@ $(call gb_UIConfig_get_clean_target,%) :
 	$(call gb_Helper_abbreviate_dirs,\
 		rm -f $(call gb_UIConfig_get_target,$*) $(call gb_UIConfig_get_imagelist_target,$*) \
 	)
+	$(call gb_Output_announce,$*,$(false),UIA,2)
+	rm -f $(call gb_UIConfig_get_a11yerrors_target,$*)
 
 define gb_UIConfig_a11yerrors__command
 $(call gb_Output_announce,$(2),$(true),UIA,1)
@@ -132,11 +134,6 @@ else
 	touch $@
 endif
 
-.PHONY : $(call gb_UIA11YErrorsTarget_get_clean_target,%)
-$(call gb_UIA11YErrorsTarget_get_clean_target,%) :
-	$(call gb_Output_announce,$*,$(false),UIA,2)
-	rm -f $(call gb_UIConfig_get_a11yerrors_target,$*)
-
 gb_UIConfig_get_packagename = UIConfig/$(1)
 gb_UIConfig_get_packagesetname = UIConfig/$(1)
 
@@ -190,7 +187,6 @@ $(call gb_UIConfig_get_imagelist_target,$(1)) : $(call gb_UIImageListTarget_get_
 $(call gb_UIConfig_get_clean_target,$(1)) : $(call gb_UIImageListTarget_get_clean_target,$(2))
 
 $(call gb_UIConfig_get_a11yerrors_target,$(1)) : UIFILES += $(SRCDIR)/$(2).ui
-$(call gb_UIConfig_get_clean_target,$(1)) : $(call gb_UIA11YErrorsTarget_get_clean_target,$(2))
 
 endef