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

========

https://hg.mozilla.org/integration/gaia-central/rev/8ac8b8a096fa
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #23618 from RudyLu/keyboard/Bug985334_popup_originalKey

Bug 985334 - [Keyboard UX update][User Story] Second layer popup behavior.
r=timdream.

========

https://hg.mozilla.org/integration/gaia-central/rev/8a01d096a074
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 985334 - to include the original key in the alternative char menu.
Bumping manifests a=b2g-bump