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

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https://hg.mozilla.org/integration/gaia-central/rev/07a0aaaf4724
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #26957 from KevinGrandon/bug_1112748_dual_home_screens

Bug 1112748 - Do not install horizontal home screen onto devices r=ochameau r=rickychien

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https://hg.mozilla.org/integration/gaia-central/rev/35397a319883
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1112748 - Do not install horizontal home screen onto devices
Bumping manifests a=b2g-bump