Bumping gaia.json for 4 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/142505d882b3
Author: Aki Sasaki <aki@escapewindow.com>
Desc: Merge pull request #11134 from escapewindow/master

bug 896324 - Add Catalan to languages-dev.json.

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https://hg.mozilla.org/integration/gaia-central/rev/57d1de6505fb
Author: Aki Sasaki <aki@escapewindow.com>
Desc: Delete languages_shira.json

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https://hg.mozilla.org/integration/gaia-central/rev/11449be9daa6
Author: Aki Sasaki <aki@escapewindow.com>
Desc: Delete languages_basecamp.json

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https://hg.mozilla.org/integration/gaia-central/rev/a32a0afc8146
Author: Aki Sasaki <aki@escapewindow.com>
Desc: bug 896324 - Add Catalan to languages-dev.json.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "b201c99bbf0b429b5013f38ba21e777ce4408be2", 
+    "revision": "142505d882b3a1f7eb767af193e5862771e3fdc6", 
     "repo_path": "/integration/gaia-central"
 }