[Merge] ~mkukri/ubuntu/+source/cd-boot-images-amd64:amd64 into ~ubuntu-core-dev/ubuntu/+source/cd-boot-images-amd64:amd64

[Benjamin Drung]

Review: Approve

Merged after adding the LP bug reference.
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https://code.launchpad.net/~mkukri/ubuntu/+source/cd-boot-images-amd64/+git/cd-boot-images-amd64/+merge/473436
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