asan: Mark printf-4.c as unsupported on Windows.
Although sprintf is not intercepted on Windows, this test can pass
if sprintf calls memmove, which is intercepted, so we can't XFAIL it.
// RUN: %env_asan_opts=check_printf=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
// RUN: not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
-// FIXME: sprintf is not intercepted on Windows yet.
-// XFAIL: win32
+// FIXME: sprintf is not intercepted on Windows yet. But this test can
+// pass if sprintf calls memmove, which is intercepted, so we can't XFAIL it.
+// UNSUPPORTED: win32
#include <stdio.h>
int main() {
