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

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https://hg.mozilla.org/integration/gaia-central/rev/57aedcebe10c
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Merge pull request #17089 from millermedeiros/969472-event-tap-disable

Bug 969472 - [B2G][Calendar] Events can still be tapped on and viewed when no calendar accounts are activated r=gaye

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https://hg.mozilla.org/integration/gaia-central/rev/9fe9b28ada28
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Bug 969472 - [B2G][Calendar] Events can still be tapped on and viewed when no calendar accounts are activated

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "branch": "", 
         "revision": ""
     }, 
-    "revision": "1e68cf8bff3622535b0460614c51620e76278127", 
+    "revision": "57aedcebe10cd4fef4dc111f1b7347ba1ea3286c", 
     "repo_path": "/integration/gaia-central"
 }