Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/7d85710a4dc1
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Merge pull request #22298 from asutherland/email-localdrafts

Bug 963331 - [B2G][email] Recieved emails can be moved to 'Local Drafts'  folder. r=asuth

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https://hg.mozilla.org/integration/gaia-central/rev/f966b153e155
Author: Alex Wissmann <awiss@mozilla.com>
Desc: Bug 963331 - [B2G][email] Recieved emails can be moved to 'Local Drafts' folder. r=asuth
Bumping manifests a=b2g-bump