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

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https://hg.mozilla.org/integration/gaia-central/rev/7cddd8685b23
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #25280 from KevinGrandon/bug_1084458_confirm_dialog_shb

Bug 1084458 - [Soft Home button] buttons on OTA screen confirmation are partially covered

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https://hg.mozilla.org/integration/gaia-central/rev/93c776663612
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1084458 - [Soft Home button] buttons on OTA screen confirmation are partially covered r=mhenretty

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "3e512cec66ff360b9afb15fb7d77333b3f01b8cf", 
+    "revision": "7cddd8685b23ba7f7af299ff45ba540bd8f3af5c", 
     "repo_path": "/integration/gaia-central"
 }