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

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https://hg.mozilla.org/integration/gaia-central/rev/8e963a6e6ce2
Author: autolander <kgrandon@mozilla.com>
Desc: Bug 1094601 - merge pull request #25866 from KevinGrandon:bug_1094601_remove_search_strings to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/fceacc9ef2ec
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1094601 - Remove strings from search html pages
Bumping manifests a=b2g-bump