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

========

https://hg.mozilla.org/integration/gaia-central/rev/2d9efd61d043
Author: Yuren Ju <yurenju@gmail.com>
Desc: Merge pull request #21899 from yurenju/wlach-1039739

Bug 1039739 - Add some logging when writing the git commit id into the s... r=@yurenju

========

https://hg.mozilla.org/integration/gaia-central/rev/cd79430fcc38
Author: William Lachance <wlachance@mozilla.com>
Desc: Bug 1039739 - Add some logging when writing the git commit id into the settings app;r=yurenju

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "f1e043e26ed2c6f4853a838e398b436b1a80229d", 
+    "revision": "2d9efd61d04383be8c93f486cce23fb90e6b96fa", 
     "repo_path": "/integration/gaia-central"
 }