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

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https://hg.mozilla.org/integration/gaia-central/rev/341d2e8963e9
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23335 from KevinGrandon/bug_1052488_rocketbar_background_polish

Bug 1052488 - [Rocketbar] Implement opacity/color matching to statusbar

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https://hg.mozilla.org/integration/gaia-central/rev/08a69d76dea5
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1052488 - [Rocketbar] Implement opacity/color matching to statusbar r=kgrandon
Bumping manifests a=b2g-bump