[Merge] lp:~dannf/ubuntu/trusty/base-installer/arm64 into lp:ubuntu/base-installer

[Colin Watson]

Review: Approve

Looks OK, thanks.  Tests would be nice at some point if there are machines whose cpuinfo we can post publicly.
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https://code.launchpad.net/~dannf/ubuntu/trusty/base-installer/arm64/+merge/199972
Your team Ubuntu branches is requested to review the proposed merge of lp:~dannf/ubuntu/trusty/base-installer/arm64 into lp:ubuntu/base-installer.