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

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https://hg.mozilla.org/integration/gaia-2_0/rev/2dfbe3f1ccc8
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20851 from KevinGrandon/bug_1016432_to_2_dot_oh

Bug 1016432 - [Search] Fix unit tests with a newer mocha a=nbotb,test_only

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https://hg.mozilla.org/integration/gaia-2_0/rev/bb97bfbb165c
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 1016432 - [Search] Fix unit tests with a newer mocha r=kgrandon
Bumping manifests a=b2g-bump