autotools: Fix Gettext files installation

Gettext files are not installed in autotools. This has been fixed
so they are now installed properly.
3 jobs for improve-dir-install in 8 minutes and 43 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Test
passed #259981
flatpak

00:05:46

 
  Review
passed #259982
review

00:02:56

manual #259983
allowed to fail manual
stop_review