First stab at mixins in VM compiler

tests/language/language.status

Index: tests/language/language.status
===================================================================
--- tests/language/language.status	(revision 18475)
+++ tests/language/language.status	(working copy)
@@ -56,26 +56,11 @@
 
 type_parameter_literal_test: Fail # Issue 7551
 
-mixin_field_test: Fail
-mixin_is_test: Fail
-mixin_method_test: Fail
-mixin_naming_test: Fail
-mixin_extends_field_test: Fail
-mixin_extends_is_test: Fail
-mixin_extends_method_test: Fail
-mixin_mixin_test: Fail
 mixin_illegal_syntax_test/none: Fail
-mixin_illegal_superclass_test/none: Fail
-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_mixin_test: Fail
 mixin_type_parameters_super_test: Fail
 mixin_type_parameters_mixin_extends_test: Fail
 mixin_type_parameters_super_extends_test: Fail
-mixin_this_use_test: Fail
-mixin_lib_extends_method_test: Fail
 mixin_lib_extends_field_test: Fail
 
 [ $compiler == none && ($system == macos || $system == linux) && $arch == ia32 && $checked ]
@@ -365,26 +350,12 @@
 overridden_no_such_method_test: Fail, Pass, OK # Fails in minified mode, test depends on method names.
 
 # Mixins fail on the VM.
-mixin_field_test: Fail                          # VM issue
-mixin_is_test: Fail                             # VM issue
-mixin_method_test: Fail                         # VM issue
-mixin_naming_test: Fail                         # VM issue
-mixin_extends_field_test: Fail                  # VM issue
-mixin_extends_is_test: Fail                     # VM issue
-mixin_extends_method_test: Fail                 # VM issue
-mixin_mixin_test: Fail                          # VM issue
 mixin_illegal_syntax_test/none: Fail            # VM issue
-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_mixin_test: Fail          # VM issue
 mixin_type_parameters_super_test: Fail          # VM issue
 mixin_type_parameters_mixin_extends_test: Fail  # VM issue
 mixin_type_parameters_super_extends_test: Fail  # VM issue
-mixin_this_use_test: Fail                       # VM issue
-mixin_lib_extends_method_test: Fail             # VM issue
-mixin_lib_extends_field_test: Fail              # VM issue
 
 # Malformed types not handled as unresolved:
 import_core_prefix_test: Fail