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

========

https://hg.mozilla.org/integration/gaia-central/rev/de69f15b2b3f
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #22295 from cctuan/1045919

Bug 1045919 - JavaScript Error: "TypeError: AppWindowManager.getActiveApp(...) is null" {file: "app://system.gaiamobile.org/js/activity_window_manager.js"

========

https://hg.mozilla.org/integration/gaia-central/rev/e98ef151696e
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1045919 - JavaScript Error: "TypeError: AppWindowManager.getActiveApp(...) is null" {file: "app://system.gaiamobile.org/js/activity_window_manager.js"
Bumping manifests a=b2g-bump