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

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https://hg.mozilla.org/integration/gaia-central/rev/9c1dab50f6fd
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Merge pull request #10617 from asutherland/pre-hook-excluded

Bug 886971 - Pre-commit hook excluded file list does not work; do not quote back-ticks. r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/379fc2420a46
Author: James Burke <jrburke@gmail.com>
Desc: Bug 886971 - Pre-commit hook excluded file list does not work; do not quote back-ticks. r=timdream