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

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https://hg.mozilla.org/integration/gaia-central/rev/7cdb69546a02
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #11462 from pivanov/bug-903438

Bug 903438 - [Settings][HD] Text spacing incorrect in "Call Settings" and "Celluar & Data"

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https://hg.mozilla.org/integration/gaia-central/rev/fa7036c4d030
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 903438 - [Settings][HD] Text spacing incorrect in "Call Settings" and "Celluar & Data"