[Merge] lp:~utlemming/livecd-rootfs/v374-ubuntu-cpc into lp:livecd-rootfs

[Ben Howard]

The proposal to merge lp:~utlemming/livecd-rootfs/v374-ubuntu-cpc into lp:livecd-rootfs has been updated.

Description changed to:

Fixes for ubuntu-cpc image building. Due to a change in kpartx output, the loop setup needed to change.

Changes:
- fixed kpartx loop setup due to new kpartx
- grub-install is now explict for i386/amd64 architectures
- changed ubuntu-cpc/hooks/032-disk-image.binary to be more readable

For more details, see:
https://code.launchpad.net/~utlemming/livecd-rootfs/v374-ubuntu-cpc/+merge/284803
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Your team Ubuntu Core Development Team is requested to review the proposed merge of lp:~utlemming/livecd-rootfs/v374-ubuntu-cpc into lp:livecd-rootfs.