I implemented some review feedback from Paul Eggleton on these
variables:
TARGET_CFLAGS
BUILD_OPTIMIZATION
SDKMACHINE
IMAGE_ROOTFS_ALIGNMENT
IMAGE_DEVICE_TABLES
EXTRA_IMAGECMD
SSTATE_MIRROR_ALLOW_NETWORK
PACKAGE_ARCHS
SDK_PACKAGE_ARCHS
(From yocto-docs rev: 6fd804376367449494d5a5cfeb7e9bb2f4c04de1)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>