Comment 9 for bug 1384955

I verified this by:
 - MAAS deploying an HP ProLiant m400 system w/ xenial
 - enabling proposed
 - adding ppa:canonical-kernel-team/unstable (for next step)
 - installing linux-image-extra-4.8.0-37-generic 4.8.0-37.39~16.04.2
 - verified that the previous step caused flash-kernel from proposed to be installed
 - verified that the new kernel landed a compressed kernel image in /boot
 - rebooting
 - verified that i booted into the newly installed kernel