Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/83c3edbb0373
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1162027 - merge pull request #30107 from azasypkin:bug-1162027-split-inbox-index to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/8162954af478
Author: Aleh Zasypkin <azasypkin@mozilla.com>
Desc: Bug 1162027 - [Messages][New Gaia Architecture] extract inbox/index.html. r=schung

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https://hg.mozilla.org/integration/gaia-central/rev/143c60bee8f2
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1161456 - merge pull request #30133 from sfoster:bidi-ftu-wifi-bug-1161456 to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/989f7c091044
Author: Sam Foster <sfoster@mozilla.com>
Desc: Bug 1161456 - Handle bidi wifi ids

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "8ca93673869a64e09ed6153c5402896822dfb253", 
+        "git_revision": "ee2f5b57b8aaf1ad07c9fde61ced7358aac78670", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "ce5b9f84c7e253e3615694be152d257995ce2238", 
+    "revision": "83c3edbb0373cb64ddf7ecb757a821462c831b0d", 
     "repo_path": "integration/gaia-central"
 }