setup_sdcard: avoid duplicated code for --img-Xgb commandline options.

Drop deprecated $[...] (bash <2.0) notation in favor of $((...)).
Also add --img-8gb switch.

Signed-off-by: Matthieu Crapet <mcrapet@gmail.com>
bb.org: next: use dart-1.8

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
elinux: add keyring

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
test: move winston into cloud9 ide build

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
cloud9: unpackage the install stuff

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
cloud9: migrate to my pkg builds (same exact version)

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>