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

========

https://hg.mozilla.org/integration/gaia-central/rev/b55d2780462e
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #19261 from etiennesegonzac/bug-986062-edge-reflow-take-2

Bug 986062 edge reflow take 2 r=vingtetun,janx

========

https://hg.mozilla.org/integration/gaia-central/rev/6f5cf42576b3
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Bug 986062 - Adding an integration test making sure we don't reflow during edge gestures. Take #2.

========

https://hg.mozilla.org/integration/gaia-central/rev/6dec66e2f9eb
Author: Arnau <arnau@arnaumarch.com>
Desc: Merge pull request #19322 from pacorampas/replace-images-dialer-1010129

Bug 1010129 - [Dialer] Replace outdated icons and add missing ones. r=rik

========

https://hg.mozilla.org/integration/gaia-central/rev/c5bf4db8dc3d
Author: Paco Rampas <pacorampas@gmail.com>
Desc: Bug 1010129 - [Dialer] Replace outdated icons and add missing ones.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "53b04508404f02388a18b2c073c04f42334571ea", 
+    "revision": "b55d2780462e9576f9142fd63593d28c2e148ed7", 
     "repo_path": "/integration/gaia-central"
 }