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

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https://hg.mozilla.org/integration/gaia-central/rev/a0dd4b73745e
Author: punamdahiya <punamdahiya@yahoo.com>
Desc: Merge pull request #23221 from davidflanagan/bug1046167

Bug 1046167-[Gallery]- Limit the allowable size of progressive jpegs r=russn

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https://hg.mozilla.org/integration/gaia-central/rev/c434cdefd79b
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1046167: limit the allowable size of progressive jpegs

make the pjpeg image size limit stricter than for other image sizes

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "8c87851961c5f5cdf3bab497621a7fb6c3888728", 
+    "revision": "a0dd4b73745efbd3db3f8e8914517c7be0d048b4", 
     "repo_path": "/integration/gaia-central"
 }