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

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https://hg.mozilla.org/integration/gaia-central/rev/cec2f675e2c2
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #10857 from crh0716/891042

Bug 891042 - Add a mock for mozIccManager

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https://hg.mozilla.org/integration/gaia-central/rev/ee8354d7ae50
Author: crh0716 <crh0716@gmail.com>
Desc: Bug 891042 - Add a mock for mozIccManager