Bumping gaia.json for 2 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/78af53d0658a
Author: Dale  Harvey <dale@arandomurl.com>
Desc: Merge pull request #10761 from leob2g/bug_889164_update_slider_youtube_videos

BUG 889164 updating slider whenever controls shown. r=daleharvey

========

https://hg.mozilla.org/integration/gaia-central/rev/4177f1c13772
Author: jyothiprasadg <jyothi.prasad@lge.com>
Desc: BUG 889164 updating slider whenever controls shown