change android and build-tools versions in setup instructions

Author: Nikolay Tsonev

start/ns-setup-linux.md

@@ -80,7 +80,7 @@ Complete the following steps to set up NativeScript on your Linux development ma
 
 1. Install the required Android SDKs and the Local Maven repository for Support Libraries.
 
-    <pre class="add-copy-button"><code class="language-terminal">sudo $ANDROID_HOME/tools/android update sdk --filter tools,platform-tools,android-23,build-tools-23.0.3,extra-android-m2repository,extra-google-m2repository,extra-android-support --all --no-ui
+    <pre class="add-copy-button"><code class="language-terminal">sudo $ANDROID_HOME/tools/android update sdk --filter tools,platform-tools,android-25,build-tools-25.0.2,extra-android-m2repository,extra-google-m2repository,extra-android-support --all --no-ui
     </code></pre>
 
 1. Setup Android Emulators (AVD) by following the article [here]({%slug android-emulators%})

start/ns-setup-os-x.md

@@ -96,7 +96,7 @@ Complete the following steps to setup NativeScript on your macOS development mac
 
         1. Select all packages for the Android 22 SDK, Android SDK Build-tools 23.0.3 or later, Local Maven repository for Support Libraries (under Extras) and any other SDKs that you want to install and click **Install**. You can alternatively use the following command, which will install all required tools:
 
-           <pre class="add-copy-button"><code class="language-terminal">android update sdk --filter tools,platform-tools,android-23,build-tools-23.0.3,extra-android-m2repository,extra-google-m2repository,extra-android-support --all --no-ui
+           <pre class="add-copy-button"><code class="language-terminal">android update sdk --filter tools,platform-tools,android-25,build-tools-25.0.2,extra-android-m2repository,extra-google-m2repository,extra-android-support --all --no-ui
            </code></pre>
 
 1. Setup Android Emulators (AVD) by following the article [here]({%slug android-emulators%})

start/ns-setup-win.md

@@ -67,7 +67,7 @@ Complete the following steps to set up NativeScript on your Windows development
 
 5. Install the required Android SDKs and the Local Maven repository for Support Libraries.
 
-    <pre class="add-copy-button"><code class="language-terminal">echo yes | "%ANDROID_HOME%\tools\android" update sdk --filter tools,platform-tools,android-23,build-tools-23.0.3,extra-android-m2repository,extra-google-m2repository,extra-android-support --all --no-ui
+    <pre class="add-copy-button"><code class="language-terminal">echo yes | "%ANDROID_HOME%\tools\android" update sdk --filter tools,platform-tools,android-25,build-tools-25.0.2,extra-android-m2repository,extra-google-m2repository,extra-android-support --all --no-ui
     </code></pre>
 
 6. Install Android virtual devices (AVDs)