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

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https://hg.mozilla.org/integration/gaia-central/rev/5e4087a76c67
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #21652 from KevinGrandon/bug_1037864_gaia_grid_localization

Bug 1037864 - [GaiaGrid] Serve localization from within the gaia grid component

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https://hg.mozilla.org/integration/gaia-central/rev/e3b41ce293d9
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1037864 - [GaiaGrid] Serve localization from within the gaia grid component r=crdlc
Bumping manifests a=b2g-bump