Add tests for generic methods in strong mode

tests/language_strong/language_strong.status

 # Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # Skip entire suite if not running in strong mode.
 [ $strong == false ]
 *: SkipByDesign
 
 # Skip tests that are not yet strong-mode clean.
 [ $strong ]
@@ skipping 244 matching lines @@
 function_type_call_getter2_test: Skip
 function_type_parameter2_negative_test: Skip
 function_type_parameter_negative_test: Skip
 function_type_test: Skip
 generic_closure_test: Skip
 generic_constructor_mixin2_test: Skip
 generic_constructor_mixin3_test: Skip
 generic_constructor_mixin_test: Skip
 generic_field_mixin6_test: Skip
 generic_list_checked_test: Skip
+generic_methods_boundaries_test: Skip
+generic_methods_closure_test: Skip
+generic_methods_dynamic_test: Skip
+generic_methods_generic_class_tearoff_test: Skip
+generic_methods_local_function_test: Skip
+generic_methods_local_variable_declaration_test: Skip
+generic_methods_named_parameters_test: Skip
+generic_methods_optional_parameters_test: Skip
+generic_methods_overloading_test: Skip
+generic_methods_recursive_bound_test: Skip
+generic_methods_reuse_type_variables_test: Skip
+generic_methods_shadowing_test: Skip
+generic_methods_simple_as_expression_test: Skip
+generic_methods_simple_is_expression_test: Skip
+generic_methods_tearoff_specialization_test: Skip
+generic_methods_unused_parameter_test: Skip

[asgerf, 2017/03/09 10:36:51]

This section is for tests that are not yet strong-mode clean, i.e. tests that
are wrong in strong mode and need to be updated.

The status lines relevant for dartk are in language_strong_kernel.status, and
these line should be moved there.

[Dmitry Stefantsov, 2017/03/10 13:21:55]

Now I see. Thanks for the suggestion! I've moved the lines there, including the
new ones that we now have because of multi-tests. Also, I put there the outcomes
that the tests generate currently.

 generic_tearoff_test: Skip
 generic_test: Skip
 generics_test: Skip
 get_set_syntax_test: Skip
 getter_declaration_negative_test: Skip
 getter_no_setter2_test: Skip
 getter_no_setter_test: Skip
 getter_override2_test: Skip
 getter_override_test: Skip
 getter_parameters_test: Skip
@@ skipping 444 matching lines @@
 no_main_test/01: MissingStaticWarning # Issue 28823
 regress_23089_test: CompileTimeError # Issue 28823
 reify_typevar_static_test/00: MissingCompileTimeError # Issue 28823
 super_setter_test: StaticWarning # Issue 28823
 top_level_non_prefixed_library_test: CompileTimeError # Issue 28823
 try_catch4_test: StaticWarning # Issue 28823
 try_catch5_test: StaticWarning # Issue 28823
 
 [ $compiler == dart2analyzer && $system != windows ]
 bad_raw_string_test/03: MissingCompileTimeError # Issue 28664