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

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https://hg.mozilla.org/integration/gaia-central/rev/aebbefb8569c
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20838 from daleharvey/1025854

Bug 1025854 - Remove invalid test. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/6eb0bb2a4561
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 1025854 - Remove invalid test. r=kgrandon
Bumping manifests a=b2g-bump