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

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https://hg.mozilla.org/integration/gaia-central/rev/b9dd9fa57603
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #26816 from mancas/bug1111658

Bug 1111658 - SIM Toolkit dialog are improperly placed with software hom...

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https://hg.mozilla.org/integration/gaia-central/rev/99b0b1bb9fb9
Author: Manuel <manuel.casasbarrado@telefonica.com>
Desc: Bug 1111658 - SIM Toolkit dialog are improperly placed with software home button
Bumping manifests a=b2g-bump