Bug 914085 - Enable Promises in B2G. r=gwagner
Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/5da6ee38b14c
Author: Rudy Lu <left.lu@gmail.com>
Desc: Merge pull request #11587 from RudyLu/contacts/Bug894040-cleanup_assets

Bug 894040 - Cleanup some obsolete assets in Contacts app. r=jmcanterafonseca

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https://hg.mozilla.org/integration/gaia-central/rev/52674fb07889
Author: Rudy Lu <left.lu@gmail.com>
Desc: Bug 894040 - Cleanup some obsolete assets in Contacts app