Also put in a cross-reference in the existing KERNEL_SRC
variable.
(From yocto-docs rev: 705074a16490155cd64469af3b2ea12a0780281c)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>