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

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https://hg.mozilla.org/integration/gaia-central/rev/0ebfdcbb9978
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Merge pull request #30688 from gabrielesvelto/bug-1174710-do-not-send-notifications-for-empty-ussd-messages

Bug 1174710 - Do not send a notification when receiving empty USSD messages r=thills

========

https://hg.mozilla.org/integration/gaia-central/rev/be74d49444d3
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 1174710 - Do not send a notification when receiving empty USSD messages r=thills

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "c0c218fe20ff4d07a7dd8777ea7d6835c89d663b", 
+        "git_revision": "b741bf55c4d0a0216e6bea33b85957cfc58d0870", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "ec78a3825d5edec15d68f75308f97be59ddf3de0", 
+    "revision": "0ebfdcbb99782559e2ea9a3b919c9cf2863dffd3", 
     "repo_path": "integration/gaia-central"
 }