In stub-generator tests, look for dartc with the arch the test is configured for

tests/stub-generator/testcfg.py

Index: tests/stub-generator/testcfg.py
diff --git a/tests/stub-generator/testcfg.py b/tests/stub-generator/testcfg.py
index 31dd70adaa5167fc2cf75a3aa3889440e75b0b2c..04fa3fb7ce2fd29dc9ad3432c3106a4afed91331 100644
--- a/tests/stub-generator/testcfg.py
+++ b/tests/stub-generator/testcfg.py
@@ -55,7 +55,7 @@ class DartStubTestCase(test_case.StandardTestCase):
     src = join(self.GetPath(), interface)
     dest = join(self.GetPath(), GeneratedName(interface))
     (_, tmp) = tempfile.mkstemp()
-    command = self.context.GetDartC(self.mode, 'dartc')
+    command = self.context.GetDartC(self.mode, self.arch)
     self.RunCommand(command + [ src,
                                 # dartc generates output even if it has no
                                 # output to generate.
@@ -108,7 +108,7 @@ class DartStubTestConfiguration(test_configuration.StandardTestConfiguration):
     super(DartStubTestConfiguration, self).__init__(context, root)
 
   def ListTests(self, current_path, path, mode, arch, component):
-    dartc = self.context.GetDartC(mode, 'dartc')
+    dartc = self.context.GetDartC(mode, arch)
     self.context.generate = os.access(dartc[0], os.X_OK)
     tests = []
     for root, dirs, files in os.walk(join(self.root, 'src')):