Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/2e75c75b609d
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 1018515 - Remove google link from search providers. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/f9043720cca5
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #19734 from KevinGrandon/bug_1016239_part1_extract_dedupe

Bug 1016239 - [Collections App][Part 1] Extract dedupe logic from search.js

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https://hg.mozilla.org/integration/gaia-central/rev/d8f881fb678b
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1016239 - [Collections App][Part 1] Extract dedupe logic from search.js r=ranbena r=armin
Bumping manifests a=b2g-bump