--- a/jdk/makefiles/GenerateData.gmk	Wed Jul 05 18:14:56 2017 +0200
+++ b/jdk/makefiles/GenerateData.gmk	Tue Jul 03 16:10:44 2012 -0700
@@ -69,6 +69,7 @@
 	$(RM) $@
 	$(TOOL_GENERATECURRENCYDATA) -o $@.temp < $<
 	$(MV) $@.temp $@
+	$(CHMOD) 444 $@
 
 GENDATA += $(GENDATA_CURDATA)