Added 64-bits OSX support to the parser bindings generator.

src/CppParser/Bindings/ParserGen.cs

@@ -210,8 +210,14 @@ namespace CppSharp
                 ConsoleDriver.Run(new ParserGen(GeneratorKind.CSharp, "i686-apple-darwin12.4.0",
                     CppAbi.Itanium));
                 Console.WriteLine();
+
+                Console.WriteLine("Generating the C# parser bindings for OSX...");
+                ConsoleDriver.Run(new ParserGen(GeneratorKind.CSharp, "x86_64-apple-darwin12.4.0",
+                    CppAbi.Itanium));
+                Console.WriteLine();
             }
 
+
             if (Directory.Exists(LINUX_INCLUDE_BASE_DIR))
             {
                 Console.WriteLine("Generating the C# parser bindings for Linux...");