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

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https://hg.mozilla.org/integration/gaia-central/rev/c37aba2da845
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23984 from KevinGrandon/bug_1038178_gaia_grid_scroll_container_follow_up

Bug 1038178 - [GaiaGrid] Use document scroll frame for calculation

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https://hg.mozilla.org/integration/gaia-central/rev/2242fa759221
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1038178 - [GaiaGrid] Use document scroll frame for calculation r=kgrandon
Bumping manifests a=b2g-bump