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

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https://hg.mozilla.org/integration/gaia-central/rev/676d1b0fbfed
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #13495 from jrburke/bug932331-log-state-waitForTransitionEnd

Bug 932331 - email extra logging for test timeout case r=gaye

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https://hg.mozilla.org/integration/gaia-central/rev/ef6064281d48
Author: jrburke <jrburke@gmail.com>
Desc: Bug 932331 - email extra logging for test timeout case