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

========

https://hg.mozilla.org/integration/gaia-central/rev/8e0e1cfb92f1
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #18721 from KevinGrandon/bug_1002264_remove_system_publish

Bug 1002264 - [System] Remove System.publish function

========

https://hg.mozilla.org/integration/gaia-central/rev/fbf0ff9e346f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1002264 - [System] Remove System.publish function r=alive
Bumping manifests a=b2g-bump