Added a fake option for multiple inheritance so that the build stays healthy.

Signed-off-by: Dimitar Dobrev <dpldobrev@yahoo.com>

src/Generator/Driver.cs

@@ -153,6 +153,7 @@ namespace CppSharp
             TranslationUnitPasses.AddPass(new CheckDuplicatedNamesPass());
             if (Options.GenerateAbstractImpls)
                 TranslationUnitPasses.AddPass(new GenerateAbstractImplementationsPass());
+            if (Options.GenerateInterfacesForMultipleInheritance)
                 TranslationUnitPasses.AddPass(new MultipleInheritancePass());
         }
 
@@ -272,6 +273,7 @@ namespace CppSharp
         public bool GeneratePartialClasses;
         public bool GenerateVirtualTables;
         public bool GenerateAbstractImpls;
+        public bool GenerateInterfacesForMultipleInheritance;
         public bool GenerateInternalImports;
         public string IncludePrefix;
         public bool WriteOnlyWhenChanged;

tests/CSharpTemp/CSharpTemp.cs

@@ -10,6 +10,11 @@ namespace CppSharp.Tests
         {
         }
 
+        public override void SetupPasses(Driver driver)
+        {
+            driver.Options.GenerateInterfacesForMultipleInheritance = true;
+        }
+
         static class Program
         {
             public static void Main(string[] args)