buildroot

uclibc: fix compile if locales are enabled

Reported via #buildroot, the newly activated locale
tool should only build for the target, not for the host.

Fix from upstream.

Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>
Tested-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>