[Merge] lp:~ogra/phablet-tools/fix-phablet-config-reboot into lp:phablet-tools

[Parameswaran Sivatharman]

Review: Approve

+1
phablet-config writable-image part that threw 'protocol fault' prior to this change is not seen with this change in the latest run. 
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https://code.launchpad.net/~ogra/phablet-tools/fix-phablet-config-reboot/+merge/234792
Your team Ubuntu Phablet Team is requested to review the proposed merge of lp:~ogra/phablet-tools/fix-phablet-config-reboot into lp:phablet-tools.