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

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https://hg.mozilla.org/integration/gaia-central/rev/fa608f778920
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 985853 - Amend the test cases. r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/84f7e6e2e26d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert " - Amend the test cases."

This reverts commit 733f17c2a4a9ac954b89f625f5ec5d154610af8b.

Reverted for not containing the proper bug number. See bug 985853.
Bumping manifests a=b2g-bump