Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/2bcf223e3a7f
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #11164 from alivedise/bugzilla/897874/notification-disappearing

Bug 897874: Delay the notification transition before event handler, r=timdream, a=leo+

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https://hg.mozilla.org/integration/gaia-central/rev/e4e69274fdb1
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 897874: Delay the notification transition before event handler