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

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https://hg.mozilla.org/integration/gaia-central/rev/ecc1f076f911
Author: Fabrice Desré <fabrice@desre.org>
Desc: Merge pull request #26835 from fabricedesre/hide-addons

Bug 1112391 - Hide addons from the homescreen r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/f0defb32ab1c
Author: Fabrice Desré <fabrice@desre.org>
Desc: Bug 1112391 - Hide addons from the homescreen r=kgrandon
Bumping manifests a=b2g-bump