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

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https://hg.mozilla.org/integration/gaia-central/rev/2304824ac517
Author: Yoshi Huang <allstars.chh@mozilla.com>
Desc: Merge pull request #19293 from kamituel/Bug_1005896_pairing_ui_tests

Bug 1005896: Pairing UI unit tests. r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/dafee6165507
Author: Kamil Leszczuk <kamituel@gmail.com>
Desc: Bug 1005896: Pairing UI unit tests.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "d54dbabfeeabeaf9e65f3065d9c3a7f9d3a670e8", 
+    "revision": "2304824ac517230a7e38b506aabe095ff89ab64c", 
     "repo_path": "/integration/gaia-central"
 }