XFAILing new test on C++03

initializer_list doesn't exist in C++03.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@266820 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/std/utilities/utility/synopsis.pass.cpp b/test/std/utilities/utility/synopsis.pass.cpp
index edb45cf..900be2a 100644
--- a/test/std/utilities/utility/synopsis.pass.cpp
+++ b/test/std/utilities/utility/synopsis.pass.cpp
@@ -8,6 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 // <utility>
+// XFAIL: c++03
 
 // #include <initializer_list>