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

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https://hg.mozilla.org/integration/gaia-central/rev/be4bb665ab91
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 904984 - Add APBW to the APN database

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https://hg.mozilla.org/integration/gaia-central/rev/5b6cfb9f6b30
Author: Arthur Chen <crh0716@gmail.com>
Desc: Revert "Bug 904984 - Add APBW to the APN database"

This reverts commit dcbef3b68374b879bca4276e0df9b4fb5f8afb52.