Ignore conflicts with decls that are not generated (#1925)

* Ignore conflicts with decls that are not generated

* Fix build error in test

src/Generator/Passes/RenamePass.cs

@@ -181,6 +181,8 @@ namespace CppSharp.Passes
                     declarations.AddRange(@class.TemplateParameters);
             }
 
+            declarations.RemoveAll(d => !d.IsGenerated);
+
             var existing = declarations.Find(d => d != decl && d.Name == newName);
             if (existing != null)
                 return CheckExisting(decl, existing);

tests/dotnet/Common/Common.Tests.cs

@@ -899,7 +899,7 @@ public class CommonTests
         using (var nonTrivialDtor = new NonTrivialDtor())
         {
         }
-        Assert.IsTrue(NonTrivialDtor.dtorCalled);
+        Assert.IsTrue(NonTrivialDtor.DtorCalled);
     }
 
     [Test]