Use SDK_GLIBC_ADDONS for eglibc-nativesdk so that it is not
dependant on the target eglibc's GLIBC_ADDONS settings.
(From OE-Core rev: e165203a6a7eb1fd47a20c3ede4d5a20ad49487f)
Signed-off-by: Lianhao Lu <lianhao.lu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>