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

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https://hg.mozilla.org/integration/gaia-central/rev/25bd1b42ec80
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #21170 from crdlc/bug-1032122

Bug 1032122 - [Vertical Homescreen] Statusbar not opaque when opening a dialog in verticalhome to remove apps/bookmarks/collections

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https://hg.mozilla.org/integration/gaia-central/rev/623c02fd82e7
Author: crdlc <crdlc@tid.es>
Desc: Bug 1032122 - [Vertical Homescreen] Statusbar not opaque when opening a dialog in verticalhome to remove apps/bookmarks/collections
Bumping manifests a=b2g-bump