images: Build Angstrom v2013.12 of angstrom v2013.12 for machine beaglebone on Angstrom-f20-vm

cmd: bitbake systemd-image chromium
packages: Build Angstrom v2013.12 of angstrom v2013.12 for machine beaglebone on Angstrom-f20-vm

cmd: bitbake systemd-image chromium