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

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https://hg.mozilla.org/integration/gaia-central/rev/e25925e80f65
Author: Michał Budzyński <michal@virtualdesign.pl>
Desc: Merge pull request #19238 from michalbe/Bug984584

Bug 984584 followup - change font weight in contact details

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https://hg.mozilla.org/integration/gaia-central/rev/a6eb0284a4f1
Author: Michal Budzynski <michal@virtualdesign.pl>
Desc: Bug 984584 followup - change font weight in contact details
Bumping manifests a=b2g-bump