Comment 23 for bug 1184297

Tested this in OVMF, confirmed that the old precise image wouldn't install the signed packages and would boot an unsigned grub.
The new image (latest daily using proposed) now installs all the signed file and boots through shimx64.

The only difference I noticed is 5 efi disk errors when booting under OVMF, those for some reason only appear with the signed grub but after a bit of debug time with Colin, it seems to be related to two broken floppy images being exposed by OVMF so it shouldn't actually show up on any actual hardware (unless they have a firmware as broken as OVMF).