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

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https://hg.mozilla.org/integration/gaia-central/rev/0767056bc6c2
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #12966 from crh0716/909689

Bug 909689 - Set data connection text based on the network mode and the existence of calls r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/ae48b9f81494
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 909689 - Set data connection text based on the network mode and the existence of calls