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

========

https://hg.mozilla.org/integration/gaia-central/rev/f04cae1e859d
Author: Marshall Culpepper <marshall.law@gmail.com>
Desc: Merge pull request #17961 from marshall/ftuPing

Bug 969101: Initial implementation of a first-time use ping. r=fabrice

========

https://hg.mozilla.org/integration/gaia-central/rev/db140ca3dc95
Author: Marshall Culpepper <marshall@mozilla.com>
Desc: Bug 969101: Initial implementation of a first-time use ping. r=fabrice
Bumping manifests a=b2g-bump