Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/d9e4d98a9fba
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #12246 from crdlc/bug-916782

Bug 916782 - Remove progress_activity.css and status.css from homescreen (it is only needed for ev.me)

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https://hg.mozilla.org/integration/gaia-central/rev/7aefd8280725
Author: crdlc <crdlc@tid.es>
Desc: Bug 916782 - Remove progress_activity.css and status.css from homescreen (it is only needed for ev.me)