.mo files have varying POT-Creation-Date in buster

.mo files have varying POT-Creation-Date on the feature/buster branch:

│ ├── /usr/share/locale/ar/LC_MESSAGES/tails.mo
│ │ ├── msgunfmt {}
│ │ │ @@ -1,12 +1,12 @@
│ │ │  msgid ""
│ │ │  msgstr ""
│ │ │  "Project-Id-Version: The Tor Project\n"
│ │ │  "Report-Msgid-Bugs-To: \n"
│ │ │ -"POT-Creation-Date: 2019-01-05 11:41+0000\n"
│ │ │ +"POT-Creation-Date: 2019-01-05 14:35+0000\n"
│ │ │  "PO-Revision-Date: 2014-12-05 17:21+0000\n"
│ │ │  "Last-Translator: Osama M. Mneina <o.mneina@gmail.com>\n"
│ │ │  "Language-Team: Arabic (http://www.transifex.com/projects/p/torproject/"
│ │ │  "language/ar/)\n"
│ │ │  "Language: ar\n"
│ │ │  "MIME-Version: 1.0\n"
│ │ │  "Content-Type: text/plain; charset=UTF-8\n"

Related issues

• Blocks #16285 (closed)
• Blocks #15507 (closed)

Original created by @lamby on 16296 (Redmine)