Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/0bdc23ae8bbc
Author: BavarianTomcat <tomcat@mozilla.com>
Desc: Revert "Bug 973445 - [settings] refactor Sound panel with AMD pattern" for breaking gaia unit tests

This reverts commit 33f54971464be54f1b362a44c31ffedad115f8e7.
Bumping manifests a=b2g-bump