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

========

https://hg.mozilla.org/integration/gaia-central/rev/78632e8ee2f3
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #11443 from lightsofapollo/kill-integration

remove old integration tests for now

========

https://hg.mozilla.org/integration/gaia-central/rev/955ecf9b4814
Author: James Lal <james@lightsofapollo.com>
Desc: remove old integration tests for now