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

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https://hg.mozilla.org/integration/gaia-central/rev/6931b82c5468
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #31894 from gaye/1204002-calendar-view-source

Bug 1204002 - View source cannot find file in calendar app r=jrburke

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https://hg.mozilla.org/integration/gaia-central/rev/66a32c3d9218
Author: gaye <gareth.aye@gmail.com>
Desc: Bug 1204002 - View source cannot find file in calendar app

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "750334a998ffc4b2d29fbd04e394d8cdd14fd29c", 
+        "git_revision": "f13c650f765d0df385f9a7cb0b4bf2eb8b666fe4", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "5ad861b50d5f2c824a606d1d3fc1632e732ef9a4", 
+    "revision": "6931b82c546814a699cdfcfa3d44bac0347e06aa", 
     "repo_path": "integration/gaia-central"
 }