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

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https://hg.mozilla.org/integration/gaia-central/rev/d346a74e0d91
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #26069 from albertopq/1093692-progressbar-followup

Bug 1093692 - Progressbar on fullscreenapps missplaced r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/d294ea0c7bb5
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1093692 - Progressbar on fullscreenapps missplaced
Bumping manifests a=b2g-bump