sdk: only install locales if we're using glibc
Using glibc-locale to install locales only makes sense if we're using glibc.
(From OE-Core rev: 8fc80734053645fa893694dfe33ddaee99aa9a1a)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>