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

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https://hg.mozilla.org/integration/gaia-central/rev/dd546c8e047c
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Merge pull request #15808 from pmclanahan/send-language-to-basket-964342

Bug 964342: Send language setting to basket. (r=fcampo)

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https://hg.mozilla.org/integration/gaia-central/rev/2e963b230adc
Author: Paul McLanahan <pmac@mozilla.com>
Desc: Bug 964342: Send language setting to basket.

* Add error codes to basket client.
* Use error code for invalid email instead of looking for a message.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "c4d102a23136462568292347be339a274f7616c7", 
+    "revision": "dd546c8e047cabd8cf5cb3e8d3d59c3ee4152db7", 
     "repo_path": "/integration/gaia-central"
 }