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

========

https://hg.mozilla.org/integration/gaia-central/rev/aa56abbdbc46
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #22200 from vingtetun/revert.revert.browser-container

Revert "Revert "Bug 1042744 - Add a container around app iframes and som...

========

https://hg.mozilla.org/integration/gaia-central/rev/240ee7e4cf30
Author: Vivien Nicolas <vnicolas@mozilla.com>
Desc: Revert "Revert "Bug 1042744 - Add a container around app iframes and some chrome UI. r=alive" under suspicion of breaking JB emulator builds"

This reverts commit ebb824c7e4c1be271d68c773ac75ae0cfb79238d.
Bumping manifests a=b2g-bump