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

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https://hg.mozilla.org/integration/gaia-central/rev/7736b561cce1
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #26684 from arai-a/bug1108965

Bug 1108965 - Call Set constructor with new in input_layout.js, r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/6284e0515169
Author: Tooru Fujisawa <arai_a@mac.com>
Desc: Bug 1108965 - Call Set constructor with new.
Bumping manifests a=b2g-bump