Apparently some distros like Debian provide C.UTF-8 but it isn't actually fully supported by glibc and thus is not available on all systems, neither Gentoo nor Fedora provide it. https://sourceware.org/bugzilla/show_bug.cgi?id=17318
* po/Rules-translit: New file. * po/arabic.sed: Likewise. * po/cyrillic.sed: Likewise. * po/greek.sed: Likewise. * po/hebrew.sed: Likewise. * po/README: Add en@cyrillic en@hebrew en@arabic and en@greek. * po/Makefile.in.in: Add extra_dist4.