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

========

https://hg.mozilla.org/integration/gaia-central/rev/ba1f9da07df2
Author: Yuren Ju <yurenju@gmail.com>
Desc: Merge pull request #20913 from yurenju/branding

Bug 996479 - {{browserBrandShortName}} is displayed instead of Firefox O... r=@cctuan

========

https://hg.mozilla.org/integration/gaia-central/rev/ea765b599ca6
Author: Yuren Ju <yurenju@gmail.com>
Desc: Bug 996479 - {{browserBrandShortName}} is displayed instead of Firefox OS (browser, FTU)
Bumping manifests a=b2g-bump