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

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https://hg.mozilla.org/integration/gaia-central/rev/92a1426bcd55
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20308 from KevinGrandon/bug_1023426_vertical_remove_zoom

Bug 1023426 - [Vertical] Remove zoom feature

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https://hg.mozilla.org/integration/gaia-central/rev/d328d1c72577
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1023426 - [Vertical] Remove zoom feature r=me
Bumping manifests a=b2g-bump