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

========

https://hg.mozilla.org/integration/gaia-central/rev/aca065d0bc5c
Author: Arthur Chen <crh0716@gmail.com>
Desc: Revert "Bug 973445 - [settings] refactor Sound panel with AMD pattern"

This reverts commit d1822016dd04f2d34cd16e30170dba0e970bae91.
Bumping manifests a=b2g-bump