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

========

https://hg.mozilla.org/integration/gaia-central/rev/547b7ef05b5d
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #11268 from huchengtw-moz/video/Bug_896415_remove_mouse_event_shim

Bug 896415 - Remove mouse_event_shim.js from video app, r=djf

========

https://hg.mozilla.org/integration/gaia-central/rev/24df66949ecb
Author: John Hu <johu@mozilla.com>
Desc: Bug 896415 - Remove mouse_event_shim.js from video app