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

========

https://hg.mozilla.org/integration/gaia-central/rev/55c5e5ee283e
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #22311 from arcturus/bug-1045503

Bug 1045503 - [tarako][contacts] we should reduce the use of storage by contacts app r=jmcf

========

https://hg.mozilla.org/integration/gaia-central/rev/6d0a183870cb
Author: Francisco Jordano <fjordano@mozilla.com>
Desc: Bug 1045503 - [tarako][contacts] we should reduce the use of storage by contacts app

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "02e996a4c33bca063122356e909b6ad7c17f8c5c", 
+    "revision": "55c5e5ee283e907486cb782f3af8535055db513e", 
     "repo_path": "/integration/gaia-central"
 }