[oe] [meta-oe][PATCH 0/2] collectd: series of build fixes

[Maciej Borzecki]

This is a series of fixes for collectd that unblock merge of rabbitmq.

The first patch of the series works around the API deprecation on
rabbitmq-c side. Most probabl collectd supports at most rabbitmq-c in
version 0.4.*. It is advisable to update to 0.5.* if no functional
problems are uncovered.

The second patch resolves issues with protobuf-c that is only
available in meta-virtualization.