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

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https://hg.mozilla.org/integration/gaia-central/rev/ce7008f6cb1d
Author: Ben Francis <ben@tola.me.uk>
Desc: Merge pull request #20069 from benfrancis/1009358

Bug 1009358 - Choose search engine r=vingtetun

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https://hg.mozilla.org/integration/gaia-central/rev/9e58e4a87c96
Author: Ben Francis <ben@tola.me.uk>
Desc: Bug 1009358 - Choose search engine
Bumping manifests a=b2g-bump