Add CoreCLR compile wrapper around System.Reflection import

Author: rjmholt

test/PowerShellEditorServices.Test.Host/ServerTestsBase.cs

@@ -10,16 +10,19 @@
 using System.Collections.Concurrent;
 using System.Diagnostics;
 using System.IO;
-using System.Reflection;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 
+#if CoreCLR
+using System.Reflection;
+#endif
+
 namespace Microsoft.PowerShell.EditorServices.Test.Host
 {
     public class ServerTestsBase
     {
-        private static int sessionCounter;        
+        private static int sessionCounter;
         private Process serviceProcess;
         protected IMessageSender messageSender;
         protected IMessageHandlers messageHandlers;
@@ -47,7 +50,7 @@ protected async Task<Tuple<int, int>> LaunchService(
             FileVersionInfo fileVersionInfo =
                 FileVersionInfo.GetVersionInfo(assemblyPath);
 
-            string sessionPath = 
+            string sessionPath =
                 Path.Combine(
                     Path.GetDirectoryName(assemblyPath), $"session-{++sessionCounter}.json");