Add the ability to run tests with several sets of VM flags

tools/testing/test_case.py

Index: tools/testing/test_case.py
diff --git a/tools/testing/test_case.py b/tools/testing/test_case.py
index 1c4f7f0f01ea7020175eb719308ea2a45a90365b..99af9d566fafc4041925dc61a6fa7970999e6454 100644
--- a/tools/testing/test_case.py
+++ b/tools/testing/test_case.py
@@ -24,7 +24,7 @@ class Error(Exception):
 
 
 class StandardTestCase(test.TestCase):
-  def __init__(self, context, path, filename, mode, arch):
+  def __init__(self, context, path, filename, mode, arch, vm_options = []):
     super(StandardTestCase, self).__init__(context, path)
     self.filename = filename
     self.mode = mode
@@ -34,6 +34,9 @@ class StandardTestCase(test.TestCase):
     for flag in context.flags:
       self.run_arch.vm_options.append(flag)
 
+    for flag in vm_options:
+      self.run_arch.vm_options.append(flag)
+
   def IsNegative(self):
     return self.GetName().endswith("NegativeTest")