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

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https://hg.mozilla.org/integration/gaia-central/rev/b776c306597b
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #10735 from EdgarChen/bug_874769_iccHelper

Bug 874769 - [Gaia] Use new WebAPI to access card state related attribute/event

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https://hg.mozilla.org/integration/gaia-central/rev/72e753ff1e85
Author: Edgar Chen <echen@mozilla.com>
Desc: Bug 874769 - Use IccHelper to access card state. r=salva,etienne,arcturus,alive,arthurcc