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

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https://hg.mozilla.org/integration/gaia-central/rev/ae6bd540e71a
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #9326 from pauljt/bug863527_v2

Bug 863527 -- Safer html injection in app error, r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/d5bc2ff16c0c
Author: Paul Theriault <ptheriault@mozilla.com>
Desc: fix bug 863527 by updating test instead of parsing untrusted input