Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/4ce132060646
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Merge pull request #22927 from Cwiiis/bug1054274-shared-overflow-menu

Bug 1054274 - Split out browser overflow menu into shared component. r=benfrancis,kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/d824a0fbd9a7
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1054274 - Use shared component for browser overflow menu. r=benfrancis,kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/9571b672aadc
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1054274 - Split out browser overflow menu into shared component. r=benfrancis,kgrandon
Bumping manifests a=b2g-bump