make with po files fails due to missing C.UTF-8 locale

[Andrey Borzenkov]

make[2]: Вход в каталог `/home/bor/build/grub/po'
LC_ALL=C.UTF-8 msginit -i ./grub.pot --no-translator -l address@hidden -o - 
2>/dev/null | LC_ALL=C.UTF-8 msgconv -t UTF-8 | LC_ALL=C.UTF-8 msgfilter -o 
./address@hidden -i - sed -f ./cyrillic.sed
msgfilter: warning: Locale charset "ANSI_X3.4-1968" is different from
                    input file charset "UTF-8".
                    Output of 'msgfilter' might be incorrect.
                    Possible workarounds are:
                    - Set LC_ALL to a locale with encoding UTF-8.
                    - Convert the translation catalog to ASCII using 'msgconv',
                      then apply 'msgfilter',
                      then convert back to UTF-8 using 'msgconv'.
/usr/bin/sed: file ./cyrillic.sed line 13: strings for `y' command are 
different lengths
msgfilter: sed subprocess terminated with exit code 1
make[2]: *** address@hidden Ошибка 1
make[2]: Выход из каталога `/home/bor/build/grub/po'
make[1]: *** address@hidden Ошибка 2
make[1]: Выход из каталога `/home/bor/build/grub/po'


The problem is, C.UTF-8 seems to be Debian specific; neither openSUSE
(which I have) nor Fedora (as can be seen from
https://bugzilla.redhat.com/show_bug.cgi?id=902094‎) provide it.

May be we should not force any specific locale and just mention in
INSTALL that during installation locale with UTF-8 codeset should be
used.