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

========

https://hg.mozilla.org/integration/gaia-central/rev/233d36e0ecad
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #21132 from KevinGrandon/bug_1023950_apply_tests

Bug 1023950 - Enable verticalhome tests now that we have an updated gecko nightly

========

https://hg.mozilla.org/integration/gaia-central/rev/e8677be117db
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1023950 - Enable verticalhome tests now that we have an updated gecko nightly
Bumping manifests a=b2g-bump