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

========

https://hg.mozilla.org/integration/gaia-central/rev/8971991af400
Author: Hubert Figuière <hub@figuiere.net>
Desc: Merge pull request #33519 from hfiguiere/bug1178812-exif-copy

Bug 1178812 - Add metadata copying to crop and resize. r=djf

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https://hg.mozilla.org/integration/gaia-central/rev/c005ec57bc9f
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 1178812 - Add metadata copying to crop, resize and edit.

jpeg-exif.js is a direct copy of
c3dc9b024f/jpeg.js
It is currently ignored by jshint.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "a46654eb3be3227062def07a80f40f8e77787403", 
+        "git_revision": "d4212d824001beb182d725f91a07377ee7b1a95d", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "09511272340095887148f59bca9b517f50c46ee5", 
+    "revision": "8971991af400583f3b951ff5230382994f28f46e", 
     "repo_path": "integration/gaia-central"
 }