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

========

https://hg.mozilla.org/integration/gaia-central/rev/7ceaca2bdd0d
Author: Albert <acperez@tid.es>
Desc: Merge pull request #19440 from acperez/bug-1013293

Bug 1013293 - Fix wrong path of some single variant resources.

========

https://hg.mozilla.org/integration/gaia-central/rev/cfd4b24b08b6
Author: Albert <acperez@tid.es>
Desc: Bug 1013293 - Fix wrong path of some single variant resources.
Bumping manifests a=b2g-bump