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

========

https://hg.mozilla.org/integration/gaia-central/rev/6bfc3ecdd1c1
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #19410 from huchengtw-moz/Stingray/Bug_1009444

Bug 1009444 - [Stingray] initialize widgets based on the result of widge..., r=lchang, r=dwi2

========

https://hg.mozilla.org/integration/gaia-central/rev/5ec4d62d0210
Author: John Hu <johu@mozilla.com>
Desc: Bug 1009444 - [Stingray] initialize widgets based on the result of widget editor
Bumping manifests a=b2g-bump