buildroot

core: add a kconfig option to require an UTF8 locale on the host

This can be selected when we need the host to have an UTF-8 locale
(e.g. to build uClibc with support for locales).

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>