update ChangeLog: last merge didn't make it in 8.12.0

ChangeLog

@@ -1,5 +1,11 @@
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 Version 8.13.0 [v8-stable] 2015-09-22
+- build requirement for rsyslog/mmnormalize is now liblognorm 1.1.2
+- mmnormalize: liblognorm error messages are now emitted via regular
+  rsyslog error reporting mechanism (aka "are now logged")
+  This is possible due to a new API in liblognorm 1.1.2;
+  Note that the amount of error messages depends on the version of
+  liblognorm used.
 - bugfix omkafka: Fixes a bug not accepting new messages anymore. 
   see also: https://github.com/rsyslog/rsyslog/pull/472
   Thanks to Janmejay Singh
@@ -16,7 +22,6 @@ Version 8.13.0 [v8-stable] 2015-09-22
   see also https://github.com/rsyslog/rsyslog/pull/490 
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 Version 8.12.0 [v8-stable] 2015-08-11
-- build requirement for rsyslog/mmnormalize is now liblognorm 1.1.2
 - Harmonize resetConfigVariables values and defaults
   see also https://github.com/rsyslog/rsyslog/pull/413
   Thanks to Tomas Heinrich for the patch.
@@ -24,11 +29,6 @@ Version 8.12.0 [v8-stable] 2015-08-11
   The file format is incompatible to previous format, but tools have been
   upgraded to handle both and also an option been added to convert from
   old to new format.
-- mmnormalize: liblognorm error messages are now emitted via regular
-  rsyslog error reporting mechanism (aka "are now logged")
-  This is possible due to a new API in liblognorm 1.1.2;
-  Note that the amount of error messages depends on the version of
-  liblognorm used.
 - bugfix: ommysql did not work when gnutls was enabled
   as it turned out, this was due to a check for GnuTLS functions
   with the side-effect that