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

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https://hg.mozilla.org/integration/gaia-central/rev/806b0bb0e348
Author: autolander <kgrandon@mozilla.com>
Desc: Bug 1094598 - merge pull request #25865 from KevinGrandon:bug_1094598_remove_strings to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/732dfdfec7be
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1094598 - [VerticalHome] Remove strings from home index.html
Bumping manifests a=b2g-bump