[clang-repl] XFAIL windows properly in simple-exception test case.

We don't have proper exception support in LLJIT on windows yet. We have to xfail windows machine, but the previous check missed out some targets.

clang/test/Interpreter/simple-exception.cpp

@@ -1,6 +1,6 @@
 // clang-format off
 // UNSUPPORTED: system-aix
-// XFAIL: arm, arm64-apple, windows-msvc, windows-gnu
+// XFAIL: arm, arm64-apple, system-windows
 // RUN: cat %s | clang-repl | FileCheck %s
 extern "C" int printf(const char *, ...);