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

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https://hg.mozilla.org/integration/gaia-central/rev/fa7cf88688b1
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #24423 from mancas/bug1071382

Bug 1071382 - [Settings] 2 Icons of brightness level out of place r=arthurcc

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https://hg.mozilla.org/integration/gaia-central/rev/64ff6fcd2a8f
Author: Manuel Casas Barrado <manuel.casasbarrado@telefonica.com>
Desc: Bug 1071382 - [Settings] 2 Icons of brightness level out of place.r=arthurcc
Bumping manifests a=b2g-bump