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

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https://hg.mozilla.org/integration/gaia-central/rev/f486771c1a2a
Author: pacorampas <b.frv@tid.es>
Desc: Merge pull request #25258 from pacorampas/1084282

Bug 1084282 - [BB] Change the link for icon fonts r=arnau

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https://hg.mozilla.org/integration/gaia-central/rev/5c3eded18452
Author: Paco Rampas <pacorampas@gmail.com>
Desc: Bug 1084282 - [BB] Change the link for icon fonts
Bumping manifests a=b2g-bump