Add (failing) test case for mixin type parameters.

tests/language/language.status

Index: tests/language/language.status
diff --git a/tests/language/language.status b/tests/language/language.status
index 075e086b65a32247ee742ac1ce4b6b6dcada11cb..f8f36cdccb2726cba61c1b9a7de91f0d97508dbf 100644
--- a/tests/language/language.status
+++ b/tests/language/language.status
@@ -70,6 +70,7 @@ mixin_illegal_constructor_test/none: Fail
 mixin_illegal_static_access_test: Fail
 mixin_illegal_super_use_test/none: Fail
 mixin_implements_test: Fail
+mixin_type_parameters_super_test: Fail
 
 [ $compiler == none && ($system == macos || $system == linux) && $arch == ia32 && $checked ]
 gc_test: Skip  # Issue 1487, flaky.
@@ -364,6 +365,7 @@ mixin_illegal_superclass_test/none: Fail   # VM issue
 mixin_illegal_constructor_test/none: Fail  # VM issue
 mixin_illegal_super_use_test/none: Fail    # VM issue
 mixin_implements_test: Fail                # VM issue
+mixin_type_parameters_super_test: Fail     # VM issue
 
 # Malformed types not handled as unresolved:
 import_core_prefix_test: Fail