Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/256019bdb55a
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 1095468 - Configure geolocation url to localhost. r=kgrandon

========

https://hg.mozilla.org/integration/gaia-central/rev/b13e5ac900e5
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Merge pull request #25901 from eeejay/bug-1069562

Bug 1069562 - Fix accessible bounds and clean up app data usage items. r=salva

========

https://hg.mozilla.org/integration/gaia-central/rev/bbb5afda2a46
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 1069562 - Fix accessible bounds and clean up app data usage items.
Bumping manifests a=b2g-bump