pass type arguments to generic functions

idea/testData/codegen/typeInfo/genericFunction.jet

@@ -0,0 +1,10 @@
+class Foo() { }
+class Bar() { }
+
+fun isInstance<T>(obj: Any?) = obj is T
+
+fun box(): String {
+  if (! isInstance<Foo>(Foo())) return "fail 1"
+  if (isInstance<Bar>(Foo())) return "fail 2"
+  return "OK"
+}