[Java.Interop.Tools.Cecil ] Properly implement DirectoryAssemblyResolver.cs.Dispose() (#90)

- we actually want the disposing to be set to true when called from
   IDisposable.Dispose method so that the resources are disposed
   (unlike when called from finalizer)

 - this fixes part of #44529

Author: radekdoulik

src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/DirectoryAssemblyResolver.cs

@@ -82,7 +82,7 @@ public DirectoryAssemblyResolver (Action<string, object[]> logWarnings, bool loa
 
 		public void Dispose ()
 		{
-			Dispose (disposing: false);
+			Dispose (disposing: true);
 			GC.SuppressFinalize (this);
 		}