Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/6da8ba668eae
Author: Zibi Braniecki <zbigniew.braniecki@gmail.com>
Desc: Merge pull request #25226 from zbraniecki/1083839-warn-when-asking-for-missing-entity

Bug 1083839: Report warnings when non-existing entities requested. r=stas

========

https://hg.mozilla.org/integration/gaia-central/rev/7eea12e1f25c
Author: Zibi Braniecki <gandalf@mozilla.com>
Desc: Bug 1083839: Report warnings when non-existing entities requested

========

https://hg.mozilla.org/integration/gaia-central/rev/2754824c5271
Author: Zibi Braniecki <zbigniew.braniecki@gmail.com>
Desc: Merge pull request #25411 from zbraniecki/1087353-add-aria-valuetext

Bug 1087353 - [L10n] Add support for aria-valuetext. r=stas

========

https://hg.mozilla.org/integration/gaia-central/rev/ece3d4f4a83f
Author: Zibi Braniecki <gandalf@mozilla.com>
Desc: Bug 1087353 - [L10n] Add support for aria-valuetext
Bumping manifests a=b2g-bump