Changelog update

CHANGELOG.md

@@ -85,6 +85,7 @@ based on _prefix_ in addition to globs. This means that a filter like
 - [#1098](https://github.com/influxdata/telegraf/issues/1098): Sanitize invalid OpenTSDB characters.
 - [#1110](https://github.com/influxdata/telegraf/pull/1110): Sanitize * to - in graphite serializer. Thanks @goodeggs!
 - [#1118](https://github.com/influxdata/telegraf/pull/1118): Sanitize Counter names for `win_perf_counters` input.
+- [#1125](https://github.com/influxdata/telegraf/pull/1125): Wrap all exec command runners with a timeout, so hung os processes don't halt Telegraf.
 
 ## v0.12.1 [2016-04-14]