Fixed [BUGID #1299]. OLD_MULTIMACH_TARGET_SYS is no longer available.
Use new recipe-scope variable REAL_MULTIMACH_TARGET_SYS instead.
(From OE-Core rev: b69a2be2f30dc633597399d42d6c87d9f0910c1a)
Signed-off-by: Lianhao Lu <lianhao.lu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>