[dotnet-linker] Add a DotNetResolver.

This is just a stub to make code compile, it's not needed at runtime.

tools/common/Application.cs

@@ -16,8 +16,12 @@ using ObjCRuntime;
 
 #if MONOTOUCH
 using PlatformResolver = MonoTouch.Tuner.MonoTouchResolver;
-#else
+#elif MMP
 using PlatformResolver = Xamarin.Bundler.MonoMacResolver;
+#elif NET
+using PlatformResolver = Xamarin.Linker.DotNetResolver;
+#else
+#error Invalid defines
 #endif
 
 namespace Xamarin.Bundler {

tools/common/Target.cs

@@ -26,10 +26,14 @@ using MonoTouch;
 using MonoTouch.Tuner;
 using PlatformResolver = MonoTouch.Tuner.MonoTouchResolver;
 using PlatformLinkContext = MonoTouch.Tuner.MonoTouchLinkContext;
-#else
+#elif MMP
 using MonoMac.Tuner;
 using PlatformResolver = Xamarin.Bundler.MonoMacResolver;
 using PlatformLinkContext = MonoMac.Tuner.MonoMacLinkContext;
+#elif NET
+using PlatformResolver = Xamarin.Linker.DotNetResolver;
+#else
+#error Invalid defines
 #endif
 
 namespace Xamarin.Bundler {

tools/dotnet-linker/DotNetResolver.cs

@@ -0,0 +1,14 @@
+using System;
+
+using Mono.Cecil;
+
+using Xamarin.Bundler;
+
+namespace Xamarin.Linker {
+	public class DotNetResolver : CoreResolver {
+		public override AssemblyDefinition Resolve (AssemblyNameReference name, ReaderParameters parameters)
+		{
+			throw new NotImplementedException ();
+		}
+	}
+}