* libgnuintl.h (_INTL_MAY_RETURN_STRING_ARG, gettext, dgettext) (dcgettext, ngettext, dngettext, dcngettext): Backport changes from current gettext to provide GCC format_arg attributes.
* MAINTAINERS: Change intl updating instructions. * config.rpath: Copy from GCC tree. * intl: Replace contents of intl directory with intl from GCC tree.