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

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https://hg.mozilla.org/integration/gaia-central/rev/0c47c512b915
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Merge pull request #11024 from asutherland/email-eat-less

Bug 893047 - [email] do not eat tap events on startup. r=jrburke

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https://hg.mozilla.org/integration/gaia-central/rev/9becf7ab5b11
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Bug 893047 - [email] do not eat tap events on startup