Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-562.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+class Program
+{
+    [DllImport("foo.dll")]
+    public static extern void printf(string format, __arglist);
+
+    public static int Main()
+    {
+        if (typeof (Program).GetMethod ("printf").CallingConvention != CallingConventions.VarArgs)
+            return 1;
+        
+        Console.WriteLine ("OK");
+        return 0;
+    }
+}