gettext

8b4fd564 - Fix "make distcheck" failure (regression from 2022-07-03).

Fix "make distcheck" failure (regression from 2022-07-03). * gettext-runtime/intl/export.h: Add a copyright notice. * gettext-runtime/intl/Makefile.am (libgnuintl.h): Eliminate this copyright notice when including export.h.