[Merge] livecd-rootfs:tune2fs into livecd-rootfs:ubuntu/master

[John Chittum]

Review: Approve

Based on reading and discussion, this looks like a safe and good change, especially for lower-powered hardware.
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https://code.launchpad.net/~ubuntu-core-dev/livecd-rootfs/+git/livecd-rootfs/+merge/436977
Your team Ubuntu Core Development Team is requested to review the proposed merge of livecd-rootfs:tune2fs into livecd-rootfs:ubuntu/master.