meson: Actually load translation files

Currently we run the script but don't actually load any files, even in a
tarball where they exist.

Fixes: 3218056e
       ("meson: Build i965 and dri stack")
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
(cherry picked from commit 7c00db95)
[Andres Gomez: resolve trivial conflicts]
Signed-off-by: Andres Gomez <agomez@igalia.com>

Conflicts:
	src/util/xmlpool/meson.build