Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/67a3857cc29a
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #25625 from arcturus/bug-837924

Bug 837924 - [CONTACTS][FACEBOOK] No indication of why Message, Wall post and view Facebook profile CTAs are disabled r=jmcf

========

https://hg.mozilla.org/integration/gaia-central/rev/ac54a794c98d
Author: Francisco Jordano <fjordano@mozilla.com>
Desc: Bug 837924 - [CONTACTS][FACEBOOK] No indication of why Message, Wall post and view Facebook profile CTAs are disabled r=jmcf

========

https://hg.mozilla.org/integration/gaia-central/rev/8e0f8123563f
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #26193 from etiennesegonzac/bug-1096704

Bug 1096704 - Prevent rocketbar trigger during an edge gesture. r=alive, aus

========

https://hg.mozilla.org/integration/gaia-central/rev/bf586cfaceb8
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Bug 1096704 - Prevent rocketbar trigger during an edge gesture.
Bumping manifests a=b2g-bump