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

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https://hg.mozilla.org/integration/gaia-central/rev/25ccad7cfcd2
Author: crdlc <crdlc@tid.es>
Desc: Bug 1006571 - Lazy load icon retrivier r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/00699d0f64f0
Author: crdlc <crdlc@tid.es>
Desc: Bug 990029 - [User Story] Icon Editing in Vertical Homescreen r=kgrandon
Bumping manifests a=b2g-bump