Make dartk-{release,debug} builders work properly again

tests/co19/co19-kernel.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.
 
 # Disable tests globally for kernel.
 [ $compiler == dartk || $compiler == dartkp ]
 Language/Libraries_and_Scripts/Imports/static_type_t01: Skip # No support for deferred libraries.
 LibTest/async/DeferredLibrary/DeferredLibrary_A01_t01: Skip # No support for deferred libraries.
-LibTest/isolate/Isolate/spawnUri_A01_t06: Fail  # Test is racy.
 
 Language/Metadata/before_export_t01: RuntimeError  # Issue 28434: Kernel IR misses these annotations.
 Language/Metadata/before_import_t01: RuntimeError  # Issue 28434: Kernel IR misses these annotations.
 Language/Metadata/before_library_t01: RuntimeError  # Issue 28434: Kernel IR misses these annotations.
 Language/Metadata/before_param_t01: RuntimeError  # Issue 28434: Kernel IR misses these annotations.
 Language/Metadata/before_param_t02: RuntimeError  # Issue 28434: Kernel IR misses these annotations.
 Language/Metadata/before_param_t03: RuntimeError  # Issue 28434: Kernel IR misses these annotations.
 Language/Metadata/before_param_t04: RuntimeError  # Issue 28434: Kernel IR misses these annotations.
 Language/Metadata/before_param_t05: RuntimeError  # Issue 28434: Kernel IR misses these annotations.
 Language/Metadata/before_param_t06: RuntimeError  # Issue 28434: Kernel IR misses these annotations.
@@ skipping 86 matching lines @@
 Language/Statements/Break/label_t03: MissingCompileTimeError
 Language/Statements/Break/label_t04: MissingCompileTimeError
 Language/Statements/Continue/label_t07: MissingCompileTimeError
 Language/Variables/final_or_static_initialization_t01: MissingCompileTimeError
 Language/Variables/final_or_static_initialization_t02: MissingCompileTimeError
 Language/Variables/final_or_static_initialization_t03: MissingCompileTimeError
 Language/Variables/final_t04: MissingCompileTimeError
 Language/Variables/final_t05: MissingCompileTimeError
 Language/Variables/final_t06: MissingCompileTimeError
 Language/Variables/final_t07: MissingCompileTimeError
-Language/Mixins/Mixin_Application/error_t01: MissingCompileTimeError # Missing compile-time error from analyzer
-Language/Mixins/Mixin_Application/error_t02: MissingCompileTimeError
 
 # dartk: JIT failures
 [ $compiler == dartk && $runtime == vm ]
 Language/Expressions/Constants/exception_t01: Crash
 Language/Expressions/Constants/exception_t02: Crash
 Language/Mixins/Mixin_Application/syntax_t16: DartkCrash
 
 # dartk: precompilation failures
 [ $compiler == dartkp && $runtime == dart_precompiled ]
+Language/Mixins/Mixin_Application/error_t01: MissingCompileTimeError
+Language/Mixins/Mixin_Application/error_t02: MissingCompileTimeError
 
 ###############################################################################
 # VM Entries
 ###############################################################################
 
 # dartk: Shared JIT & Precompiled failures
 [ ($compiler == dartk && $runtime == vm) || ($compiler == dartkp && $runtime == dart_precompiled) ]
 Language/Classes/Constructors/Generative_Constructors/execution_of_an_initializer_t02: RuntimeError # Dartk Issue 28566
 Language/Classes/Constructors/Generative_Constructors/initializing_formals_execution_t02: RuntimeError # Dartk Issue 28566
 Language/Classes/definition_t23: CompileTimeError # Dartk Issue 28567
@@ skipping 46 matching lines @@
 
 # dartk: JIT failures (debug)
 [ $compiler == dartk && $runtime == vm && $mode == debug ]
 
 # dartk: precompilation failures
 [ $compiler == dartkp && $runtime == dart_precompiled ]
 Language/Expressions/Constants/exception_t01: Crash
 Language/Expressions/Constants/exception_t02: Crash
 
 # dartk: precompilation failures (debug)
-[ $compiler == dartkp && $runtime == dart_precompiled && $mode == debug ]
+[ $compiler == dartkp && $runtime == dart_precompiled && $mode == debug ]