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

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https://hg.mozilla.org/integration/gaia-central/rev/47d1ef981981
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #11627 from crh0716/904984

Bug 904984 - Add APBW to the APN database r=kaze

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https://hg.mozilla.org/integration/gaia-central/rev/0e9d035c0901
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 904984 - Add APBW to the APN database