fix "cannot set LC_CTYPE" and other locale errors on fedora 21

Resolves errors similar to...

    bash: warning: setlocale: LC_ALL: cannot change locale (en_US)

The fix is based on the following observations...

    bash-4.3# ls /usr/lib/locale/locale-archive
    ls: cannot access /usr/lib/locale/locale-archive: No such file or directory

    bash-4.3# export LANG=en_US.utf8
    bash-4.3# locale -a
    locale: Cannot set LC_CTYPE to default locale: No such file or directory
    locale: Cannot set LC_MESSAGES to default locale: No such file or directory
    locale: Cannot set LC_COLLATE to default locale: No such file or directory
    C
    POSIX

    bash-4.3# localedef -i en_US -c -f UTF-8 en_US.utf8

    bash-4.3# locale -a
    C
    en_US.utf8
    POSIX

    bash-4.3# ls /usr/lib/locale/locale-archive
    /usr/lib/locale/locale-archive