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

========

https://hg.mozilla.org/integration/gaia-central/rev/d063205f3410
Author: Wilson Page <wilsonpage@me.com>
Desc: Merge pull request #17725 from wilsonpage/bug/972137

Bug 972137 - [Camera] 1.4 Visual Design Settings Menu

========

https://hg.mozilla.org/integration/gaia-central/rev/521925e3ccba
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 972137 - [Camera] 1.4 Visual Design Settings Menu
Bumping manifests a=b2g-bump