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

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https://hg.mozilla.org/integration/gaia-central/rev/d69d6ab1a6de
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #16058 from mcav/progressive-sound

Bug 961599 - [Clock] Sound selection list laylout offset when select a l...

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https://hg.mozilla.org/integration/gaia-central/rev/9bc8cf538ef8
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Bug 961599 - [Clock] Sound selection list laylout offset when select a long list. r=millermedeiros
Bumping manifests a=b2g-bump