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

========

https://hg.mozilla.org/integration/gaia-central/rev/41d35cc0d8c5
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #22313 from KevinGrandon/bug_1046158_homescreen_columns

Bug 1046158 - [Vertical Homescreens] Use three columns by default everywhere

========

https://hg.mozilla.org/integration/gaia-central/rev/29e95452c04c
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1046158 - [Vertical Homescreen] Use three columns by default everywhere r=aus
Bumping manifests a=b2g-bump