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

========

https://hg.mozilla.org/integration/gaia-central/rev/f99184595c66
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #22735 from julienw/1051852-use-domcontentloaded

Bug 1051852 - [Messages] use 'DOMContentLoaded' instead of 'load' to ini...

========

https://hg.mozilla.org/integration/gaia-central/rev/9236a7ad9a6c
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 1051852 - [Messages] use 'DOMContentLoaded' instead of 'load' to init the various resources r=schung
Bumping manifests a=b2g-bump