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

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https://hg.mozilla.org/integration/gaia-central/rev/7cddd8685b23
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #25280 from KevinGrandon/bug_1084458_confirm_dialog_shb

Bug 1084458 - [Soft Home button] buttons on OTA screen confirmation are partially covered

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https://hg.mozilla.org/integration/gaia-central/rev/93c776663612
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1084458 - [Soft Home button] buttons on OTA screen confirmation are partially covered r=mhenretty
Bumping manifests a=b2g-bump