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

========

https://hg.mozilla.org/integration/gaia-central/rev/4ea08e48f566
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #23825 from mikehenrty/bug-1064305-fxa-screen-flow-test

Bug 1064305 - Disable FxOS Accounts screen flow test

========

https://hg.mozilla.org/integration/gaia-central/rev/f41f013b9a8a
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1064305 - Disable FxOS Accounts screen flow test
Bumping manifests a=b2g-bump