Bumping gaia.json for 3 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/8d832c25f38a
Author: b2gautomation <jonallengriffin@gmail.com>
Desc: Update gaia-ui-tests.json; Merge pull request #1354 from bebef1987/fix_activesync

fix active sync tests

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https://hg.mozilla.org/integration/gaia-central/rev/4eadfbf700d4
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Merge pull request #12149 from jaoo/883298-backout

Bug 883298 - [FTU] Check whether there is no need to retrieve the APN settings from the apn.json database. r=fcampo

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https://hg.mozilla.org/integration/gaia-central/rev/60ce5814f98d
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Bug 883298 - [FTU] Check whether there is no need to retrieve the APN settings from the apn.json database.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "22611386c9b65b8efb001e246f48df0a2609cb6e", 
+    "revision": "8d832c25f38a02be7536b15d00f6757cb86db590", 
     "repo_path": "/integration/gaia-central"
 }