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

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https://hg.mozilla.org/integration/gaia-central/rev/0e1a7ff7723d
Author: Zibi Braniecki <zbigniew.braniecki@gmail.com>
Desc: Merge pull request #20670 from flodolo/bug983547

Bug 983547 - [system] Localize "System update" correctly in update notice after switching language. r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/3f9694069b87
Author: Francesco Lodolo (:flod) <flod@lodolo.net>
Desc: Bug 983547 - [system] Localize "System update" correctly in update notice after switching language
Bumping manifests a=b2g-bump