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

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https://hg.mozilla.org/integration/gaia-central/rev/8e33f6f8ca04
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #10454 from crh0716/883759

Bug 883759 - Hangup the waiting call when receiving CHLD=0

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https://hg.mozilla.org/integration/gaia-central/rev/7a6445a10114
Author: crh0716 <crh0716@gmail.com>
Desc: Bug 883759 - Hangup the waiting call when receiving CHLD=0
Bug 883798 - B2G SMS: test cases should initialize all necessary preferences and/or settings. r=gene