elinux: drop --beagleboard.org-production files

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
fix: this is done in setup_sdcard.sh

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

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
chroot: apt-cacher-ng and oracle-java8-installer dont get along

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