Skip ExamineComposer if not on windows

src/Umbraco.Infrastructure/Search/ExamineComposer.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Runtime.InteropServices;
 using Examine;
 using Umbraco.Core;
 using Umbraco.Core.Composing;
@@ -20,8 +21,13 @@ namespace Umbraco.Web.Search
     {
         public override void Compose(Composition composition)
         {
+            var isWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
+            if(!isWindows) return;
+
             base.Compose(composition);
 
+
+
             // populators are not a collection: one cannot remove ours, and can only add more
             // the container can inject IEnumerable<IIndexPopulator> and get them all
             composition.Register<MemberIndexPopulator>(Lifetime.Singleton);