maintain ChangeLog

ChangeLog

@@ -10,6 +10,7 @@ Version 8.37.0 [v8-stable] 2018-08-07
   With the new CI setup and new options we could reduce the Travis runtime
   dramatically and so we do not need them any longer.
 - overall adaption to gcc 8 which emits new warnings
+- fix some build warnings on 32bit systems, namely armhf architecture
 - ommail change of behavior: "enable.body" default now "on"
   This was always documented to be "on", but actually was "off". Usually, we
   fix the doc, but after long discussion the agreement was that in this