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

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https://hg.mozilla.org/integration/gaia-central/rev/698a4d25067b
Author: Ricky Chien <ricky060709@gmail.com>
Desc: Merge pull request #27442 from RickyChien/bug-972228

Bug 972228 - Verify default file content in non-distribution test r=@cctuan

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https://hg.mozilla.org/integration/gaia-central/rev/951d53342360
Author: Ricky Chien <ricky060709@gmail.com>
Desc: Bug 972228 - Verify default file content in non-distribution test

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "33cb12bb5ce7a9e21e6ecddb64a78da01e09ec54", 
+    "revision": "698a4d25067b272c7f31d87df1330faed3c9f6de", 
     "repo_path": "integration/gaia-central"
 }