Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/31aaeec3cc38
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #24019 from rsajdok/bug#1060694-b

Bug 1060694 - Next button stays active even after clearing the text field r=jrburke

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https://hg.mozilla.org/integration/gaia-central/rev/b6221691814d
Author: Robert Sajdok <robert.sajdok@gmail.com>
Desc: Bug 1060694 - Next button stays active even after clearing the text fields during New Account setup

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https://hg.mozilla.org/integration/gaia-central/rev/408b3209ba26
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Merge pull request #24238 from asutherland/email-trunk-zoom-mitigate

Bug 1058900 - [email] Workaround graphics corruption / memory spikes by cleaning up HTML display logic. r=jrburke

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https://hg.mozilla.org/integration/gaia-central/rev/e44d00a5e9c6
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Bug 1058900 - [email] Workaround graphics corruption / memory spikes by cleaning up HTML display logic. r=jrburke
Bumping manifests a=b2g-bump