Added information in the #4 box to include the cross-dev
toolchain.
(From yocto-docs rev: 198ab4326369d8c74225d9de51bf536621ab2251)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>