Commit b9ad5d46 authored by Jehan's avatar Jehan

extensions, po-plug-ins: fix localization of extension metadata.

The metadata format being appdata, I simply use standard intltool
merging on the XML templates.
For Automake, I use a custom rule instead of INTLTOOL_XML_RULE because
the m4 macro hardcoded $(top_srcdir)/po as translation source directory
(yet we want to use po-plug-ins/ for these). Meson on the other side
already used a custom command.
parent e4dfd04a
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