CB-11550 Add android@5.2.1 release blog post

This closes #619
diff --git a/www/_posts/2016-07-11-cordova-android-5.2.1.md b/www/_posts/2016-07-11-cordova-android-5.2.1.md
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+---
+layout: post
+author:
+    name: Vladimir Kotikov
+    url: https://github.com/vladimir-kotikov
+title:  "Cordova Android 5.2.1"
+categories: announcements
+tags: news releases
+---
+
+We are happy to announce that `Cordova Android 5.2.1` has been released!
+
+This release fixes a small yet annoying bug that results in impossibility to deploy app on emulator with API 23 image.
+
+This version will be used by default in next Cordova versions. As for now to install this version of **Cordova-android** you'll need to specify version explicitly.
+
+To upgrade:
+
+    npm install -g cordova
+    cd my_project
+    cordova platform update android@5.2.1
+
+To add it explicitly:
+
+    cordova platform add android@5.2.1
+
+<!--more-->
+## What's new in Android platform
+
+* [CB-9489](https://issues.apache.org/jira/browse/CB-9489) Fixed "endless waiting for emulator" issue
+* [CB-11481](https://issues.apache.org/jira/browse/CB-11481) android-library is deprecated use com.android.library instead
+
+You can also take a look at the changes included in the previous release of `Android` platform - `cordova-android 5.2.0` - [here](http://cordova.apache.org/announcements/2016/07/02/android-5.2.0.html).