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

========

https://hg.mozilla.org/integration/gaia-central/rev/dbeb8d786466
Author: Arnau <arnau@arnaumarch.com>
Desc: Merge pull request #17953 from nucliweb/991094-Recipients-BB

Bug 991094 - [Building Blocks] Create Recipients pills as BB component r=me

========

https://hg.mozilla.org/integration/gaia-central/rev/92575d8be03a
Author: Joan Leon <joan.leon@gmail.com>
Desc: Bug 991094 - [Building Blocks] Create Recipients pills as BB component
Bumping manifests a=b2g-bump