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

========

https://hg.mozilla.org/integration/gaia-central/rev/9ec621e1aa7d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20611 from crdlc/bug-1026166

Bug 1026166 - [vertical homescreen] Can activate actions on an icon through the edit header

========

https://hg.mozilla.org/integration/gaia-central/rev/dd280be68a1b
Author: crdlc <crdlc@tid.es>
Desc: Bug 1026166 - [vertical homescreen] Can activate actions on an icon through the edit header
Bumping manifests a=b2g-bump