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

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https://hg.mozilla.org/integration/gaia-central/rev/de70a6ceb83b
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #13284 from crh0716/928851_1

Bug 928851 - Adopt new API of enabling/disabing RIL radio r=evelyn,alive

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https://hg.mozilla.org/integration/gaia-central/rev/f735c1cbaf15
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 928851 - Adopt new API of enabling/disabing RIL radio