Add run lines

Author: jzc

sycl/test-e2e/VirtualFunctions/vf-optional-kernel-features.cpp

@@ -1,4 +1,7 @@
-#include <sycl/sycl.hpp>
+// RUN: %{build} -o %t.out
+// RUN: %{run} %t.out
+#include <sycl/detail/core.hpp>
+#include <sycl/usm.hpp>
 
 namespace syclext = sycl::ext::oneapi::experimental;