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

========

https://hg.mozilla.org/integration/gaia-central/rev/0940a7797002
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #20070 from crdlc/bug-1020155

Bug 1020155 - Populate collection datastore with data defined in pre_ins...

========

https://hg.mozilla.org/integration/gaia-central/rev/d047fa4b0884
Author: crdlc <crdlc@tid.es>
Desc: Bug 1020155 - Populate collection datastore with data defined in pre_installed_collections.json
Bumping manifests a=b2g-bump