Turn on fatal warnings for compiler tests in the 'dartc' tests again

compiler/dart-compiler.gyp

 # Copyright (c) 2011, 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.
 
 {
   'includes': [
     'sources.gypi',
     'test_sources.gypi',
     'corelib_sources.gypi',
     'compiler_corelib_sources.gypi',
@@ skipping 139 matching lines @@
             '<(INTERMEDIATE_DIR)/<(_target_name)/syslib.stamp',
             'api.dart',
           ],
           'outputs': [
             '<(INTERMEDIATE_DIR)/<(_target_name)/api/dart/core/com/google/dart/corelib/corelib.dart.api',
             '<(INTERMEDIATE_DIR)/<(_target_name)/api/dart/dom/dom/dom.dart.api',
             '<(INTERMEDIATE_DIR)/<(_target_name)/api/dart/html/html/html.dart.api',
             '<(INTERMEDIATE_DIR)/<(_target_name)/api/dart/json/json/json.dart.api',
           ],
           'action': [
-            '<(PRODUCT_DIR)/dartc', 'api.dart', '-out', '<(INTERMEDIATE_DIR)/<(_target_name)/api',
+            '<(PRODUCT_DIR)/dartc', 'api.dart', 
+            '--fatal-warnings', '--fatal-type-errors', 
+            '-out', '<(INTERMEDIATE_DIR)/<(_target_name)/api',
           ],
         },
         {
           'message': 'Packaging dart:core artifacts',
           'action_name': 'package_corelib_artifacts',
           'inputs': [
             '<(INTERMEDIATE_DIR)/<(_target_name)/corelib.jar.stamp',
             '<(INTERMEDIATE_DIR)/<(_target_name)/api/dart/core/com/google/dart/corelib/corelib.dart.api',
           ],
           'outputs': [
@@ skipping 74 matching lines @@
             '-Dclosure.build.dir=<(PRODUCT_DIR)/closure_out',
             'clean',
             'jar',
           ],
           'message': 'Building closure compiler'
         },
       ]
     },
   ],
 }