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

========

https://hg.mozilla.org/integration/gaia-central/rev/3903f350d342
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #20681 from crdlc/bug-1026313

Bug 1026313 - [Vertical Homescreen] Icon gets stuck when dragging it near the home button

========

https://hg.mozilla.org/integration/gaia-central/rev/ddce0c54ac54
Author: crdlc <crdlc@tid.es>
Desc: Bug 1026313 - [Vertical Homescreen] Icon gets stuck when dragging it near the home button
Bumping manifests a=b2g-bump