Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/cdc7b92b69d4
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #22867 from yurenju/pull/22765"

This reverts commit 5f51ff804b815033cd71e750c52cf19fd3950f29, reversing
changes made to 67f0e561b524f1e80468e9536a65cd7db6fcb8cb.

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https://hg.mozilla.org/integration/gaia-central/rev/bdddebf27704
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #22757 from gasolin/issue-1035775

Bug 1035775 - [B2G][System] support 24 hour time format, r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/cbe4d2b02fe3
Author: gasolin <gasolin@gmail.com>
Desc: Bug 1035775 - [B2G][System] support 24 hour time format

- add timeformatchange listener

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "67b48b77c2148286bcba5da4081694a1eab08ee1", 
+    "revision": "cdc7b92b69d4c93634cab2dae7f1b73227b50350", 
     "repo_path": "/integration/gaia-central"
 }