[test] Add mksnapshot stress test suite

test/mksnapshot/mksnapshot.isolate

Index: test/mksnapshot/mksnapshot.isolate
diff --git a/test/mksnapshot/mksnapshot.isolate b/test/mksnapshot/mksnapshot.isolate
new file mode 100644
index 0000000000000000000000000000000000000000..9c90de515fe2eb1985835f4b7b71db08e0861922
--- /dev/null
+++ b/test/mksnapshot/mksnapshot.isolate
@@ -0,0 +1,16 @@
+# Copyright 2015 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+{
+  'variables': {
+    'files': [
+      './mksnapshot.status',
+      './testcfg.py',
+      '<(PRODUCT_DIR)/mksnapshot<(EXECUTABLE_SUFFIX)',
+    ],
+  },
+  'includes': [
+    '../../src/base.isolate',
+    '../../tools/testrunner/testrunner.isolate',
+  ],
+}