This change allows btrfs subvolumes to be found in additional system
configurations. The old logic failed to correctly identify subvolumes
when the root fs was mounted as a subvolume that was not the btrfs
filesystem root.
Signed-off-by: Adam Mills <adam@armills.info>
Upstream-commit: c3aa75c5a73bed12f44d863618cabef780f5f5bd
Component: engine