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

========

https://hg.mozilla.org/integration/gaia-central/rev/020cc128dbe2
Author: Douglas Sherk <github@sherk.me>
Desc: Merge pull request #23431 from tamarahills/bugfix/1035763

Bug 1035763 - Support 24 hour time format. r=drs

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https://hg.mozilla.org/integration/gaia-central/rev/18804d7f2549
Author: Tamara Hills <thills@mozilla.com>
Desc: Bug 1035763 -- Support 24 hour time format. r=drs.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "6bf13f5f25a3e1a56711a9ce64c43b76bf1f78ca", 
+    "revision": "020cc128dbe26c0a2e1378b94239181c90d38100", 
     "repo_path": "/integration/gaia-central"
 }