Add missing icon url

Author: mythz

NuGet.Signed/ServiceStack.OrmLite.Signed/servicestack.ormlite.signed.nuspec

@@ -14,6 +14,7 @@
     <projectUrl>https://github.com/ServiceStack/ServiceStack.OrmLite</projectUrl>
     <licenseUrl>https://servicestack.net/terms</licenseUrl>
     <requireLicenseAcceptance>true</requireLicenseAcceptance>
+    <iconUrl>https://servicestack.net/img/logo-32.png</iconUrl>
     <tags>OrmLite POCO Code-First Orm Schema-less Blobs</tags>
     <language>en-US</language> 
     <copyright>Copyright 2015 Service Stack</copyright>