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

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https://hg.mozilla.org/integration/gaia-central/rev/bf3f18645f42
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #11636 from evhan55/906753

Bug 906753 - [Messages] we should see the recipients count in the header when composing a multi-recipient messag
r=julien

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https://hg.mozilla.org/integration/gaia-central/rev/5ce9861a03c0
Author: Evelyn Eastmond <evelyn@bocoup.com>
Desc: Bug 906753 - [Messages] we should see the recipients count in the header when composing a multi-recipient messag