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

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https://hg.mozilla.org/integration/gaia-central/rev/02f6a299304a
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #12543 from huchengtw-moz/camera/Bug_921821_picture_size_larger_when_rotating

Bug 921821 - [Buri][Camera]The picture size larger than normally size wh...r=djf

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https://hg.mozilla.org/integration/gaia-central/rev/3a0d5482ffd2
Author: John Hu <johu@mozilla.com>
Desc: Bug 921821 - [Buri][Camera]The picture size larger than normally size when you rotate the phone to landscape mode

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "7362250f91639a42fcdc7eebaa078e56b0f6547a", 
+    "revision": "02f6a299304a4f4f5dddfb4f5dc499d1c150eb37", 
     "repo_path": "/integration/gaia-central"
 }