Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/79299d6691c1
Author: Greg Weng <snowmantw@gmail.com>
Desc: Revert "Merge pull request #27039 from snowmantw/bug1116091"

This reverts commit 8f9412ce170991067a1a10cfaa4cba64d2034c33, reversing
changes made to dd23a7b904dd93fdeb399b34822d389d7b3ddc3b.
Bumping manifests a=b2g-bump