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

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https://hg.mozilla.org/integration/gaia-central/rev/272955d39f21
Author: Dale  Harvey <dale@arandomurl.com>
Desc: Merge pull request #11106 from daleharvey/814436

Bug 814436 - Ensure clear data dialogs have warning UI. r=benfrancis

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https://hg.mozilla.org/integration/gaia-central/rev/b96f15d568d5
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 814436 - Ensure clear data dialogs have warning UI