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

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https://hg.mozilla.org/integration/gaia-central/rev/d954e31b5a0a
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #11144 from huchengtw-moz/video/Bug_897216_video_app_plays_video_in_wrong_direction

Bug 897216 - [video] Video app plays videos recorded by the camera sidew... r=davidflanagan

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https://hg.mozilla.org/integration/gaia-central/rev/72861e29a82e
Author: John Hu <johu@mozilla.com>
Desc: Bug 897216 - [video] Video app plays videos recorded by the camera sideways

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "a3f07d3946b2a69c2d0c415632026611255b6e38", 
+    "revision": "d954e31b5a0afe995f20110ed7b397ecf8cc34cc", 
     "repo_path": "/integration/gaia-central"
 }