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

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https://hg.mozilla.org/integration/gaia-central/rev/98f8d19dee9d
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #10261 from crh0716/873917

Bug 873917 - Use new request confirming message

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https://hg.mozilla.org/integration/gaia-central/rev/14735567926c
Author: crh0716 <crh0716@gmail.com>
Desc: Bug 873917 - Use new request confirming message