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

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https://hg.mozilla.org/integration/gaia-central/rev/407ca0cf5960
Author: punamdahiya <punamdahiya@yahoo.com>
Desc: Merge pull request #22161 from ranjithgithub/1039988_ShareButtonNotWorking

Bug-1039988 - [Gallery] Fix of share button in fullscreen mode for images that needs EXIF to display correctly r=pdahiya

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https://hg.mozilla.org/integration/gaia-central/rev/6c0110252eed
Author: ranjith.gutha <ranjith.gutha@lge.com>
Desc: Bug-1039988 Fixing Javascript error while pressing share button in full screen mode

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "1cd03cacf9f793d1997c5f32fe25d8b25dc1e379", 
+    "revision": "407ca0cf5960a1911e189fed54ae12829f82fcdc", 
     "repo_path": "/integration/gaia-central"
 }