hopefully gb_Executable_EXT_for_build does it

i18npool/source/localedata/Makefile

@@ -37,7 +37,7 @@ localedata_%.cxx : localedata_%_invis.cxx
 	sed 's/\(^.*get[^;]*$$\)/SAL_DLLPUBLIC_EXPORT \1/' $< > $@
 
 localedata_%_invis.cxx : $(realpath $(SRC_ROOT)/i18npool/source/localedata/data)/%.xml saxparser.rdb \
-	$(OUTDIR_FOR_BUILD)/bin/saxparser$(gb_Executable_EXT)
+	$(OUTDIR_FOR_BUILD)/bin/saxparser$(gb_Executable_EXT_for_build)
 ifeq ($(OS_FOR_BUILD),WNT)
 	$(gb_Helper_execute)saxparser $* `cygpath -m $<` $@ \
 		$(my_file)`cygpath -m $(WORKDIR)/CustomTarget/i18npool/source/localedata/saxparser.rdb` `cygpath -m $(OUTDIR)/bin/types.rdb` \