title: cant release Hello World app on android emulator xamarin
body: <p>i recently installed Visual Studio Community Edition 2015 and xamarin, i downloaded android sdk packages (19,21,23 api). I builted succesfully my solution but on release state i get the following:</p>
  
  <pre><code> `I:Unknown]:              Found Android SDK. API levels: 19, 21, 23
  [I:Unknown]:              Found Xamarin.Android 6.1.0
  [D:RunShellCommand]:      emulator-5554 getprop
  [D:RunShellCommand]:      emulator-5554 am broadcast -a "mono.android.intent.action.PACKAGE_VERSIONS" -e "packages" "Mono.Android.DebugRuntime,Mono.Android.Platform.ApiLevel_21,App1.App1" "Mono.Android.DebugRuntime/com.xamarin.mono.android.PackageVersions"
  [D:RunShellCommand]:      emulator-5554 cat /data/system/packages.xml
  [D:RunShellCommand]:      emulator-5554 cat /dbdata/system/packages.xml
  [D:RunShellCommand]:      emulator-5554 pm uninstall "Mono.Android.DebugRuntime"
  [D:RunShellCommand]:      emulator-5554 pm uninstall "Mono.Android.DebugRuntime"
  [D:RunShellCommand]:      emulator-5554 rm "/data/local/tmp/Mono.Android.DebugRuntime-debug.apk"
  [W:Failed to delete package file: {0}]: One or more errors occurred.
  [E:]:                     Deployment failed
  Mono.AndroidTools.AdbException: Read-only file system
     at Mono.AndroidTools.Util.AggregateAsyncResult.CheckError(CancellationToken token)
     at Mono.AndroidTools.Adb.AdbSyncClient.EndPush(IAsyncResult result)
     at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
  </code></pre>
  
  <p>Please Help!!!!</p>