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

========

https://hg.mozilla.org/integration/gaia-central/rev/8c4e9cd79f7e
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #22583 from arcturus/bug-1039189

Bug 1039189 - [User Story] Access connectivity settings when offline in search UI r=kgrandon

========

https://hg.mozilla.org/integration/gaia-central/rev/f556f773a99d
Author: Francisco Jordano <fjordano@mozilla.com>
Desc: Bug 1039189 - [User Story] Access connectivity settings when offline in search UI r=kgrandon
Bumping manifests a=b2g-bump