Bumping gaia.json for 1 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/0c1f21738fac
Author: Mike Pennisi <mike@mikepennisi.com>
Desc: Bug 884890 - [MMS][Multirecipient] Use CSS and touch events for handling the recipients container pull&push effects r=julienw