Akihiro Motoki a4f4351013 Fix build-openstack-releasenotes by non-existing msgmerge
"gettext" command is provided by gettext-base package in Xenial.
To make build-openstack-releasenotes work we need to check commands
like "msgmerge" provided by gettext package.

Change-Id: I6c9f303dd5f284d7df68a4b764b84a05309f6693
2018-10-21 17:28:21 +09:00
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