If no POT file is found, gettext will automatically create it; this, in
turn, will cause msgmerge to be run, and that will cause the PO files to
be touched and changed at the very first call for `make`.

Having the PO files with unstaged changes will ultimately lead to merge
issues will pulling from the remote repository between releases - unless
`git checkout -f` is called prior to `git pull -r`.

I think intltool only has some rule to avoid that from happening unless
on dist, but I have no intention of dragging intltool into the build of
a library that barely has localized messages.