We have a sudden CI failure which is maybe because of a change of
intltool-merge. We believe it might be because of a missing directory.
Let's test making it before running the command.
Fixes:
> /usr/bin/intltool-merge ../../../po-tags
> ../../../data/tags/gimp-tags-default.xml.in gimp-tags-default.xml -x -u
> -c ../../po-tags/.intltool-merge-cache
> No such file or directory at /usr/bin/intltool-merge line 396.
845f1c81ed