Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/23f3f5295abf
Author: huchengtw-moz <johu@mozilla.com>
Desc: Merge pull request #9784 from huchengtw-moz/settings/Bug_842252_change_data_call_setting_architecture

Bug 842252 - [B2G][Setting] Change data call setting architecture in Gai...r=@jaoo, r=@arthurcc, r=@fcampo

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https://hg.mozilla.org/integration/gaia-central/rev/128513a67470
Author: John Hu <johu@mozilla.com>
Desc: Bug 842252 - [B2G][Setting] Change data call setting architecture in Gaia.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "c4e3c4a6845127324c818c506d15a6a852a40311", 
+    "revision": "23f3f5295abf9a8c28aae5f03534ce5419ecbba7", 
     "repo_path": "/integration/gaia-central"
 }