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

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https://hg.mozilla.org/integration/gaia-central/rev/bf3a67026235
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #13959 from KevinGrandon/bug_942214_system_throws_error

Bug 942214 - [System] remove a few errors being logged r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/1286baee4749
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 942214 - [System] remove a few errors being logged