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

========

https://hg.mozilla.org/integration/gaia-central/rev/ba5f179a8e55
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #11772 from KevinGrandon/bug_909675_calendar_test_dom

Bug 909675 - Leverage web component polyfill for test DOM r=lightsofapollo

========

https://hg.mozilla.org/integration/gaia-central/rev/56b9188afa4c
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 909675 - Leverage web component polyfill for test DOM