Fixed a few lifetime/ownership issues in cctest/test-api.

test/cctest/cctest.cc

Index: test/cctest/cctest.cc
diff --git a/test/cctest/cctest.cc b/test/cctest/cctest.cc
index 865bc6d22a27504c42f8ec7c2ca46f9e54119238..b1cf5abb4e62284c2d9ea75942b2f2d0e6f253ef 100644
--- a/test/cctest/cctest.cc
+++ b/test/cctest/cctest.cc
@@ -199,6 +199,7 @@ int main(int argc, char* argv[]) {
   }
   if (print_run_count && tests_run != 1)
     printf("Ran %i tests.\n", tests_run);
+  CcTest::TearDown();
   if (!disable_automatic_dispose_) v8::V8::Dispose();
   return 0;
 }